Resource

Specifier Reference

All the specifiers and metadata keys you can put inside UPROPERTY, UFUNCTION, UCLASS, USTRUCT, UENUM, and UMETA. Filter by macro, kind, or category.

Macro Builder

Pick specifiers, fill in values, and copy the full macro line. Conflicts are caught automatically.

Name

Macro

Kind

Description

EditAnywhere

UPROPERTYSpecifier

Property is editable on class defaults and placed instances.

EditInstanceOnly

UPROPERTYSpecifier

Property is editable only on placed instances, not on class defaults.

EditDefaultsOnly

UPROPERTYSpecifier

Property is editable only on class defaults (the CDO), not on placed instances.

VisibleAnywhere

UPROPERTYSpecifier

Property is visible in the editor on defaults and instances but not editable. Use for components and runtime state.

VisibleInstanceOnly

UPROPERTYSpecifier

Property is visible only on placed instances but not editable.

VisibleDefaultsOnly

UPROPERTYSpecifier

Property is visible only on class defaults but not editable.

BlueprintReadWrite

UPROPERTYSpecifier

Property can be read and written from Blueprint. Requires an Edit or Visible specifier to also appear in details.

BlueprintReadOnly

UPROPERTYSpecifier

Property can be read from Blueprint but not written. The safer default — only promote to ReadWrite when Blueprint genuinely needs to write.

BlueprintSetter

UPROPERTYSpecifier

Specifies a custom setter function that Blueprint calls when writing this property.

BlueprintGetter

UPROPERTYSpecifier

Specifies a custom getter function that Blueprint calls when reading this property.

BlueprintAssignable

UPROPERTYSpecifier

Multicast delegate can be assigned (bound to) in Blueprint. Use on dynamic multicast delegates.

BlueprintCallable

UPROPERTYSpecifier

Multicast delegate can be called (broadcast) from Blueprint.

BlueprintAuthorityOnly

UPROPERTYSpecifier

Multicast delegate only accepts events marked BlueprintAuthorityOnly in Blueprint.

Replicated

UPROPERTYSpecifier

Property is replicated over the network. Requires GetLifetimeReplicatedProps implementation.

ReplicatedUsing

UPROPERTYSpecifier

Property is replicated and calls the specified function when the value changes on the client.

NotReplicated

UPROPERTYSpecifier

Property is skipped during replication. Only valid on struct members or RPC service request parameters. Using it on a class property is a compile error.

Config

UPROPERTYSpecifier

Property value is loaded from and saved to the class config .ini file.

GlobalConfig

UPROPERTYSpecifier

Property is loaded from the global (base) config, not subclass-specific configs.

Transient

UPROPERTYSpecifier

Property is not saved or loaded. Reset to default on load. Use for runtime-only state.

DuplicateTransient

UPROPERTYSpecifier

Property is reset to default when the object is duplicated (copy/paste, Play In Editor).

TextExportTransient

UPROPERTYSpecifier

Property is not exported to text format (copy/paste).

NonPIEDuplicateTransient

UPROPERTYSpecifier

Property is only duplicated in Play In Editor, reset in all other duplication.

SaveGame

UPROPERTYSpecifier

Property is included in save game serialization.

SkipSerialization

UPROPERTYSpecifier

Property is not serialized at all but can still be exported to text.

NonTransactional

UPROPERTYSpecifier

Property changes are not recorded in the undo/redo transaction buffer.

Category

UPROPERTYSpecifier

Groups the property under a named category in the details panel. Use | for subcategories.

SimpleDisplay

UPROPERTYSpecifier

Property is shown in the simple (non-advanced) view of the details panel.

AdvancedDisplay

UPROPERTYSpecifier

Property is hidden behind the Advanced dropdown in the details panel.

NoClear

UPROPERTYSpecifier

Hides the Clear button on object reference properties in the editor.

Instanced

UPROPERTYSpecifier

Object property is a component-like instance. The referenced object is duplicated with the outer and is editable inline.

Export

UPROPERTYSpecifier

Object can be exported with its outer actor. Used for subobject serialization.

EditFixedSize

UPROPERTYSpecifier

Array elements can be modified in the editor, but the array size cannot be changed.

Interp

UPROPERTYSpecifier

Property can be driven by Sequencer tracks. Implies EditAnywhere and BlueprintVisible.

AssetRegistrySearchable

UPROPERTYSpecifier

Property value is indexed in the Asset Registry for fast queries without loading the asset.

ExposeOnSpawn

UPROPERTYMeta

Property is exposed as a pin on the SpawnActor node in Blueprint.

FieldNotify

UPROPERTYSpecifier

Enables the field notification system for this property. Used with MVVM and UI binding.

Getter

UPROPERTYSpecifier

Specifies a custom native getter function for the property.

Setter

UPROPERTYSpecifier

Specifies a custom native setter function for the property.

ClampMin

UPROPERTYMeta

Hard minimum value in the editor UI. The slider and text input will not allow values below this. Does not enforce at runtime — add your own clamping in code if needed.

ClampMax

UPROPERTYMeta

Hard maximum value in the editor UI. The slider and text input will not allow values above this. Does not enforce at runtime — add your own clamping in code if needed.

UIMin

UPROPERTYMeta

Minimum value for the editor slider. The value can still be typed below this.

UIMax

UPROPERTYMeta

Maximum value for the editor slider. The value can still be typed above this.

SliderExponent

UPROPERTYMeta

Exponent for logarithmic slider scaling. Values above 1 cluster precision near the low end.

Delta

UPROPERTYMeta

Increment amount when using the spinbox arrows in the editor.

FixedIncrement

UPROPERTYMeta

Fixed increment for value adjustments. The value snaps to multiples of this.

LinearDeltaSensitivity

UPROPERTYMeta

Sensitivity multiplier for linear delta changes when dragging the value.

Units

UPROPERTYMeta

Display unit label next to the value. Supports Centimeters, Meters, Kilometers, Degrees, Seconds, etc.

AllowedClasses

UPROPERTYMeta

Comma-separated list of classes allowed for a soft or object reference property.

DisallowedClasses

UPROPERTYMeta

Comma-separated list of classes not allowed for a soft or object reference property.

MetaClass

UPROPERTYMeta

Restricts a TSubclassOf property to subclasses of the specified class.

MetaStruct

UPROPERTYMeta

Restricts an FInstancedStruct property to instances of the specified struct.

MustImplement

UPROPERTYMeta

Object reference must implement the specified interface.

Bitmask

UPROPERTYMeta

Marks an integer property as a bitmask. Enables the bitmask editor widget. Only valid on non-float numeric properties. Pair with BitmaskEnum to name individual bits.

BitmaskEnum

UPROPERTYMeta

Enum to use for naming individual bits in a bitmask property. Requires Bitmask on the same property.

ArraySizeEnum

UPROPERTYMeta

Enum that determines the fixed size of a static array. Array indices map to enum values.

GetOptions

UPROPERTYMeta

Name of a UFUNCTION that returns a TArray<FString> to populate a dropdown for this property.

DisplayName

UPROPERTYMeta

Custom display name for the property in the editor details panel.

ToolTip

UPROPERTYMeta

Custom tooltip shown when hovering over the property in the editor.

ShortToolTip

UPROPERTYMeta

Short tooltip used in compact UI contexts.

EditCondition

UPROPERTYMeta

Boolean expression that controls whether this property is editable. Grays out the field when false.

EditConditionHides

UPROPERTYMeta

When combined with EditCondition, hides the property entirely instead of graying it out.

InlineEditConditionToggle

UPROPERTYMeta

Boolean property that shows as an inline checkbox next to the property it controls via EditCondition.

MultiLine

UPROPERTYMeta

FString or FText property uses a multi-line text editor.

AllowPrivateAccess

UPROPERTYMeta

Allows Blueprint to access a private property. Use with BlueprintReadWrite or BlueprintReadOnly.

MakeStructureDefaultValue

UPROPERTYMeta

Default value for a struct member when the struct is used as a function parameter.

TitleProperty

UPROPERTYMeta

Struct member whose value is shown as the array element title in the editor. Makes struct arrays readable.

EditInline

UPROPERTYMeta

Internal metadata set automatically by the Instanced specifier. Don't set manually — use Instanced instead, which also sets PersistentInstance and ExportObject.

ShowOnlyInnerProperties

UPROPERTYMeta

Struct property shows its members directly in the parent category without a collapsible header.

ValidEnumValues

UPROPERTYMeta

Comma-separated list of enum values that are valid for this property. Others are hidden from the dropdown.

InvalidEnumValues

UPROPERTYMeta

Comma-separated list of enum values that are invalid for this property. These are hidden from the dropdown.

BlueprintCallable

UFUNCTIONSpecifier

Function can be called from Blueprint graphs. The most common UFUNCTION specifier.

BlueprintPure

UFUNCTIONSpecifier

Function has no side effects and no execution pin. Implies BlueprintCallable. Use for getters and math.

BlueprintImplementableEvent

UFUNCTIONSpecifier

C++ declares the function signature, Blueprint provides the implementation. No C++ body.

BlueprintNativeEvent

UFUNCTIONSpecifier

C++ provides a default implementation (_Implementation suffix), Blueprint can override it.

BlueprintAuthorityOnly

UFUNCTIONSpecifier

Function only executes if the object has network authority. Silently skipped on clients.

BlueprintCosmetic

UFUNCTIONSpecifier

Function is cosmetic and won't run on dedicated servers. Use for VFX, sound, and UI feedback.

BlueprintGetter

UFUNCTIONSpecifier

Function serves as the Blueprint getter for a UPROPERTY with BlueprintGetter specified.

BlueprintSetter

UFUNCTIONSpecifier

Function serves as the Blueprint setter for a UPROPERTY with BlueprintSetter specified.

SealedEvent

UFUNCTIONSpecifier

Blueprint event cannot be overridden in child Blueprints. The implementation is sealed.

Server

UFUNCTIONSpecifier

Function is an RPC from client to server. Requires Reliable or Unreliable.

Client

UFUNCTIONSpecifier

Function is an RPC from server to the owning client. Requires Reliable or Unreliable.

NetMulticast

UFUNCTIONSpecifier

Function is an RPC from server to all connected clients. Requires Reliable or Unreliable.

Reliable

UFUNCTIONSpecifier

RPC is guaranteed to arrive. Uses a queue — overuse causes buffer overflow and disconnects.

Unreliable

UFUNCTIONSpecifier

RPC is best-effort. May be dropped under congestion. Use for frequent non-critical calls.

WithValidation

UFUNCTIONSpecifier

RPC must have a _Validate function that returns bool. If it returns false, the client is disconnected.

ServiceRequest

UFUNCTIONSpecifier

Function is a network service request.

ServiceResponse

UFUNCTIONSpecifier

Function is a network service response.

Exec

UFUNCTIONSpecifier

Function is callable from the in-game console (~). Only works on PlayerControllers, Pawns, HUDs, Cheat Managers, and Game Modes.

CallInEditor

UFUNCTIONSpecifier

Function gets a button in the details panel that calls it while in the editor (not at runtime).

CustomThunk

UFUNCTIONSpecifier

Function has a custom Blueprint VM thunk instead of the auto-generated one. For advanced use.

Category

UFUNCTIONSpecifier

Category under which the function appears in the Blueprint action menu. Required for BlueprintCallable.

DisplayName

UFUNCTIONMeta

Custom display name for the function in the Blueprint action menu and node title.

ReturnDisplayName

UFUNCTIONMeta

Custom display name for the return value pin on the Blueprint node.

ToolTip

UFUNCTIONMeta

Custom tooltip shown when hovering over the function in the Blueprint action menu.

ShortToolTip

UFUNCTIONMeta

Short tooltip used in compact contexts.

DefaultToSelf

UFUNCTIONMeta

Specified parameter defaults to Self (the calling object). Hides the pin when Self is valid.

WorldContext

UFUNCTIONMeta

Specified parameter is auto-filled with the world context. Required for static Blueprint Function Library functions.

HidePin

UFUNCTIONMeta

Hides the specified parameter pin from the Blueprint node. The parameter uses its default value.

AdvancedDisplay

UFUNCTIONMeta

Comma-separated parameter names that are hidden behind the Advanced dropdown on the Blueprint node.

ExpandBoolAsExecs

UFUNCTIONMeta

Bool return or output parameter becomes multiple execution output pins (true/false branches).

ExpandEnumAsExecs

UFUNCTIONMeta

Enum parameter or return becomes multiple execution output pins, one per enum value.

Latent

UFUNCTIONMeta

Function is latent — it doesn't complete immediately. Shows a clock icon on the Blueprint node.

LatentInfo

UFUNCTIONMeta

Specifies which parameter holds the FLatentActionInfo. Required with Latent.

DeprecatedFunction

UFUNCTIONMeta

Marks the function as deprecated. Blueprint shows a warning when the node is used.

DeprecationMessage

UFUNCTIONMeta

Message shown when a deprecated function is used in Blueprint.

DevelopmentOnly

UFUNCTIONMeta

Function is stripped from shipping builds. Use for debug and development tools.

BlueprintInternalUseOnly

UFUNCTIONMeta

Function can't be placed directly by users. Used for internal engine functions that drive async nodes.

CommutativeAssociativeBinaryOperator

UFUNCTIONMeta

Binary operator that allows adding extra input pins in Blueprint.

UnsafeDuringActorConstruction

UFUNCTIONMeta

Function is not safe to call during actor construction. Blueprint shows a warning.

BlueprintProtected

UFUNCTIONMeta

Function can only be called on the owning object in Blueprint, not on other references.

DeterminesOutputType

UFUNCTIONMeta

Specified parameter determines the output type. Used for functions with wildcard returns.

DynamicOutputParam

UFUNCTIONMeta

Output parameter whose type changes based on DeterminesOutputType.

AutoCreateRefTerm

UFUNCTIONMeta

Specified pass-by-reference parameters auto-create a temporary when unconnected in Blueprint.

KeyWords

UFUNCTIONMeta

Additional search keywords for finding the function in the Blueprint action menu.

CompactNodeTitle

UFUNCTIONMeta

Short title shown on a compact Blueprint node (like operator nodes).

HideSelfPin

UFUNCTIONMeta

Hides the self pin on the Blueprint node. Used for static-like functions.

Blueprintable

UCLASSSpecifier

Class can be used as a base class for Blueprints. This is inherited by child classes.

NotBlueprintable

UCLASSSpecifier

Class cannot be used as a base class for Blueprints. Use to block subclassing in BP.

BlueprintType

UCLASSSpecifier

Class can be used as a variable type in Blueprint. Does not imply Blueprintable.

Abstract

UCLASSSpecifier

Class cannot be instantiated directly. Must be subclassed.

Deprecated

UCLASSSpecifier

Class is deprecated. Instances are loaded but flagged as deprecated in the editor.

Transient

UCLASSSpecifier

Instances of this class are never saved to disk. Inherited by child classes.

NonTransient

UCLASSSpecifier

Overrides inherited Transient flag. Instances of this class are saved normally.

DefaultToInstanced

UCLASSSpecifier

All instances of this class are instanced by default. Used with EditInlineNew.

EditInlineNew

UCLASSSpecifier

Instances can be created inline in the editor from a property dropdown. Pairs with Instanced UPROPERTY.

NotEditInlineNew

UCLASSSpecifier

Overrides inherited EditInlineNew. Instances cannot be created inline.

Placeable

UCLASSSpecifier

Class can be placed in a level via the editor.

NotPlaceable

UCLASSSpecifier

Class cannot be placed in a level. Overrides inherited Placeable from parent.

Const

UCLASSSpecifier

All properties are const in Blueprint. Blueprint cannot modify this class.

Hidden

UCLASSSpecifier

Class is hidden from the class browser and other editor UI.

HideDropDown

UCLASSSpecifier

Class does not appear in class picker dropdown menus.

MinimalAPI

UCLASSSpecifier

Only the class type info is exported. Other modules can use pointers but not call functions.

Within

UCLASSSpecifier

Class can only exist as a subobject of the specified outer class.

CollapseCategories

UCLASSSpecifier

Properties are not grouped into categories in the details panel.

DontCollapseCategories

UCLASSSpecifier

Overrides inherited CollapseCategories.

AdvancedClassDisplay

UCLASSSpecifier

All properties default to AdvancedDisplay in the details panel.

ShowCategories

UCLASSSpecifier

Re-shows categories hidden by a parent class.

HideCategories

UCLASSSpecifier

Hides the specified categories from the details panel.

AutoExpandCategories

UCLASSSpecifier

Specified categories are expanded by default in the details panel.

AutoCollapseCategories

UCLASSSpecifier

Specified categories are collapsed by default in the details panel.

PrioritizeCategories

UCLASSSpecifier

Specified categories appear at the top of the details panel.

ShowFunctions

UCLASSSpecifier

Re-shows functions hidden by a parent class.

HideFunctions

UCLASSSpecifier

Hides the specified functions from the Blueprint action menu.

ClassGroup

UCLASSSpecifier

Groups the class under a named group in the editor class browser.

ComponentWrapperClass

UCLASSSpecifier

Actor is a wrapper that exists primarily to hold a component. Editor shows the component in place viewers.

SparseClassDataTypes

UCLASSSpecifier

Moves specified struct data out of the CDO into shared sparse storage. Saves memory for data that rarely varies per instance.

Config

UCLASSSpecifier

Class reads config properties from the specified .ini file.

DefaultConfig

UCLASSSpecifier

Config values are only saved to Default .ini files, not per-user overrides.

PerObjectConfig

UCLASSSpecifier

Each object instance has its own config section in the .ini file.

ConfigDoNotCheckDefaults

UCLASSSpecifier

Don't check default values when saving config. Saves all config properties unconditionally.

BlueprintSpawnableComponent

UCLASSMeta

Component can be added to a Blueprint via the Add Component button.

IsBlueprintBase

UCLASSMeta

Explicitly controls whether this class can be used as a Blueprint base. Overrides Blueprintable for specific cases.

ChildCanTick

UCLASSMeta

Child classes can tick even though the parent has ticking disabled.

ChildCannotTick

UCLASSMeta

Child classes cannot tick even if the parent has ticking enabled.

ShortTooltip

UCLASSMeta

Short tooltip used in compact class picker contexts.

KismetHideOverrides

UCLASSMeta

Comma-separated list of function overrides to hide from Blueprint.

BlueprintType

USTRUCTSpecifier

Struct can be used as a variable type in Blueprint.

Atomic

USTRUCTSpecifier

Struct is always serialized as a single unit. If any member changes, all members are serialized.

Immutable

USTRUCTSpecifier

Struct is immutable and implies Atomic. Used for engine-level types like FVector.

NoExport

USTRUCTSpecifier

UHT does not generate code for this struct. You must provide the declaration manually.

HasNativeMake

USTRUCTMeta

Struct has a C++ function for constructing it. Blueprint shows a Make node.

HasNativeBreak

USTRUCTMeta

Struct has a C++ function for breaking it into components. Blueprint shows a Break node.

HiddenByDefault

USTRUCTMeta

Struct pins are hidden by default on Blueprint nodes. User must expand to see them.

DisableSplitPin

USTRUCTMeta

Struct pin cannot be split into individual member pins on Blueprint nodes.

BlueprintType

UENUMSpecifier

Enum can be used as a variable type in Blueprint.

Flags

UENUMSpecifier

Enum is a bitflag enum. Values are powers of two and can be combined.

Bitflags

UENUMMeta

Enum values can be used as individual bit flags in a bitmask property.

UseEnumValuesAsMaskValuesInEditor

UENUMMeta

Use the actual enum values (not bit indices) as mask values in the editor bitmask widget.

DisplayName

UMETAMeta

Custom display name for an individual enum value in the editor and Blueprint.

Hidden

UMETAMeta

Hides the enum value from editor dropdowns. The value still exists in code.

ToolTip

UMETAMeta

Tooltip for an individual enum value.

BindWidget

UPROPERTYMeta

Binds a UPROPERTY to a UMG widget by name. The Blueprint compiler verifies the widget exists in the widget tree.

BindWidgetOptional

UPROPERTYMeta

Like BindWidget but the widget doesn't have to exist. The property is null if the widget is missing.

BindWidgetAnim

UPROPERTYMeta

Binds a UPROPERTY to a UMG widget animation by name.

BindWidgetAnimOptional

UPROPERTYMeta

Like BindWidgetAnim but the animation doesn't have to exist.

AllowAbstract

UPROPERTYMeta

Allows abstract classes to appear in the class picker for TSubclassOf or FSoftClassPath properties.

DisplayAfter

UPROPERTYMeta

Display this property immediately after the named property in the details panel.

DisplayPriority

UPROPERTYMeta

Numeric priority controlling display order within a category. Lower values appear first.

DeprecatedProperty

UPROPERTYMeta

Marks the property as deprecated. Blueprint shows a warning when referencing it.

MakeEditWidget

UPROPERTYMeta

Exposes an FVector or FTransform property as a movable widget in the viewport.

NoResetToDefault

UPROPERTYMeta

Hides the "Reset to Default" button for this property in the details panel.

NoSpinbox

UPROPERTYMeta

Numeric property shows a text field only, no spinbox or slider.

PasswordField

UPROPERTYMeta

FString property renders as a password field with dots instead of characters.

HideAlphaChannel

UPROPERTYMeta

Hides the alpha channel from FColor and FLinearColor property editors.

ForceShowEngineContent

UPROPERTYMeta

Asset picker shows Engine content even if the user has it hidden.

ForceShowPluginContent

UPROPERTYMeta

Asset picker shows Plugin content even if the user has it hidden.

ShowTreeView

UPROPERTYMeta

Class or asset picker uses a tree view instead of a flat list.

MaxLength

UPROPERTYMeta

Maximum character length for FString and FText properties.

FilePathFilter

UPROPERTYMeta

File extension filter for FFilePath properties in the file picker dialog.

RelativeToGameDir

UPROPERTYMeta

FFilePath picker outputs a path relative to the game directory instead of absolute.

ContentDir

UPROPERTYMeta

FDirectoryPath picker restricts to the Content directory.

AllowPreserveRatio

UPROPERTYMeta

Adds a ratio lock button for FVector properties so components scale together.

Untracked

UPROPERTYMeta

FSoftObjectPath or FSoftObjectPtr reference is not tracked by the asset registry.

AssetBundles

UPROPERTYMeta

Names the asset bundle this soft reference belongs to for PrimaryDataAsset loading.

ExactClass

UPROPERTYMeta

FSoftObjectPath picker only shows the exact AllowedClasses, not subclasses.

HideInDetailPanel

UPROPERTYMeta

Property is hidden from the details panel entirely. Still accessible in code and Blueprint.

NeverAsPin

UPROPERTYMeta

Property is never exposed as a data pin on Animation Blueprint and UMG nodes.

PinShownByDefault

UPROPERTYMeta

Property is exposed as a visible data pin by default on Animation Blueprint and UMG nodes.

AlwaysAsPin

UPROPERTYMeta

Property is always exposed as a data pin on Animation Blueprint and UMG nodes.

PinHiddenByDefault

UPROPERTYMeta

Property is exposed as a data pin but hidden by default. User can show it manually.

EditFixedOrder

UPROPERTYMeta

Prevents array elements from being reordered by dragging in the details panel.

NoElementDuplicate

UPROPERTYMeta

Hides the duplicate icon for array entries in the details panel.

DisplayThumbnail

UPROPERTYMeta

Shows a thumbnail preview of the selected asset next to the property.

ConfigHierarchyEditable

UPROPERTYMeta

Property can be edited in the config hierarchy editor.

ForceRebuildProperty

UPROPERTYMeta

Changing this property forces a refresh of sibling properties in the details panel.

GetAssetFilter

UPROPERTYMeta

Name of a UFUNCTION that filters which assets appear in the asset picker.

GetClassFilter

UPROPERTYMeta

Name of a static UFUNCTION that filters which classes appear in the class picker.

GetAllowedClasses

UPROPERTYMeta

Name of a UFUNCTION that returns allowed classes dynamically (instead of static AllowedClasses).

GetDisallowedClasses

UPROPERTYMeta

Name of a UFUNCTION that returns disallowed classes dynamically.

GetRestrictedEnumValues

UPROPERTYMeta

Name of a UFUNCTION that returns restricted enum values dynamically.

Multiple

UPROPERTYMeta

Numeric value must be a multiple of this value.

BlueprintThreadSafe

UFUNCTIONMeta

Function is safe to call from non-game threads in Blueprint. Used heavily in animation and audio.

NotBlueprintThreadSafe

UFUNCTIONMeta

Overrides a class-level BlueprintThreadSafe marking for a specific function.

BlueprintAutocast

UFUNCTIONMeta

Auto-inserts a cast node between the return value and first parameter types in Blueprint.

CallableWithoutWorldContext

UFUNCTIONMeta

BlueprintCallable function can be called without a valid world context object.

NativeBreakFunc

UFUNCTIONMeta

Function displays like a Break Struct node in Blueprint.

NativeMakeFunc

UFUNCTIONMeta

Function displays like a Make Struct node in Blueprint.

ArrayParm

UFUNCTIONMeta

Function uses the Call Array Function node pattern with wildcard array parameters.

ArrayTypeDependentParams

UFUNCTIONMeta

Parameters whose wildcard type is linked to the ArrayParm element type.

CustomStructureParam

UFUNCTIONMeta

Parameter is polymorphic in a CustomThunk function. Accepts any struct type.

MapParam

UFUNCTIONMeta

TMap parameter whose key/value types are determined at compile time.

MapKeyParam

UFUNCTIONMeta

Parameter whose type matches the key type of a MapParam.

MapValueParam

UFUNCTIONMeta

Parameter whose type matches the value type of a MapParam.

SetParam

UFUNCTIONMeta

TSet parameter whose element type is determined at compile time.

ScriptMethod

UFUNCTIONMeta

Static function is hoisted to an instance method on the first parameter's type in scripting languages.

ScriptOperator

UFUNCTIONMeta

Static function is exposed as an operator in scripting languages.

ScriptConstant

UFUNCTIONMeta

Static function is exposed as a constant in scripting languages.

DataTablePin

UFUNCTIONMeta

Parameter is a Data Table pin with row type inference in Blueprint.

HideSpawnParms

UFUNCTIONMeta

Hides the specified parameter from spawn pins on async task nodes.

CustomConstructor

UCLASSSpecifier

Prevents UHT from generating the constructor declaration. You provide it manually in the CPP block.

CustomFieldNotify

UCLASSSpecifier

Prevents UHT from generating the FieldNotify declaration. You provide it manually.

Optional

UCLASSSpecifier

Class may not be available in all contexts. Used for optional platform features.

GlobalUserConfig

UCLASSSpecifier

Config is saved to the global user settings directory, not the project.

ProjectUserConfig

UCLASSSpecifier

Config is saved to the project's user settings directory.

PerPlatformConfig

UCLASSSpecifier

Config can be overridden per platform in platform-specific .ini files.

Experimental

UCLASSSpecifier

Marks the class as experimental. Editor shows a warning badge.

EarlyAccessPreview

UCLASSSpecifier

Marks the class as early access preview. Editor shows a preview badge.

IgnoreCategoryKeywordsInSubclasses

UCLASSMeta

First subclass ignores all inherited ShowCategories and HideCategories specifiers.

DeprecatedNode

UCLASSMeta

Blueprint node for this class shows a deprecation warning when compiled.

DeprecationMessage

UCLASSMeta

Custom warning message displayed when a deprecated node is used.

ExposedAsyncProxy

UCLASSMeta

Exposes the proxy object on async task Blueprint nodes so you can bind to its delegates.

RestrictedToClasses

UCLASSMeta

Blueprint Function Library functions are only available to the specified classes.

ShowWorldContextPin

UCLASSMeta

Shows the normally hidden world context pin on Blueprint nodes for classes that don't implement GetWorld.

DontUseGenericSpawnObject

UCLASSMeta

Prevents using the generic Construct Object node. Class requires a specialized spawn function.

ProhibitedInterfaces

UCLASSMeta

Comma-separated interfaces that are incompatible with this class.

CannotImplementInterfaceInBlueprint

UCLASSMeta

Interface cannot be implemented by Blueprints. Only C++ classes can implement it.

246 of 246 specifiers

Specifier Reference

All the specifiers and metadata keys you can put inside UPROPERTY, UFUNCTION, UCLASS, USTRUCT, UENUM, and UMETA. Filter by macro, kind, or category.

Macro Builder

Pick specifiers, fill in values, and copy the full macro line. Conflicts are caught automatically.

Name

Macro

Kind

Description

EditAnywhere

UPROPERTYSpecifier

Property is editable on class defaults and placed instances.

EditInstanceOnly

UPROPERTYSpecifier

Property is editable only on placed instances, not on class defaults.

EditDefaultsOnly

UPROPERTYSpecifier

Property is editable only on class defaults (the CDO), not on placed instances.

VisibleAnywhere

UPROPERTYSpecifier

Property is visible in the editor on defaults and instances but not editable. Use for components and runtime state.

VisibleInstanceOnly

UPROPERTYSpecifier

Property is visible only on placed instances but not editable.

VisibleDefaultsOnly

UPROPERTYSpecifier

Property is visible only on class defaults but not editable.

BlueprintReadWrite

UPROPERTYSpecifier

Property can be read and written from Blueprint. Requires an Edit or Visible specifier to also appear in details.

BlueprintReadOnly

UPROPERTYSpecifier

Property can be read from Blueprint but not written. The safer default — only promote to ReadWrite when Blueprint genuinely needs to write.

BlueprintSetter

UPROPERTYSpecifier

Specifies a custom setter function that Blueprint calls when writing this property.

BlueprintGetter

UPROPERTYSpecifier

Specifies a custom getter function that Blueprint calls when reading this property.

BlueprintAssignable

UPROPERTYSpecifier

Multicast delegate can be assigned (bound to) in Blueprint. Use on dynamic multicast delegates.

BlueprintCallable

UPROPERTYSpecifier

Multicast delegate can be called (broadcast) from Blueprint.

BlueprintAuthorityOnly

UPROPERTYSpecifier

Multicast delegate only accepts events marked BlueprintAuthorityOnly in Blueprint.

Replicated

UPROPERTYSpecifier

Property is replicated over the network. Requires GetLifetimeReplicatedProps implementation.

ReplicatedUsing

UPROPERTYSpecifier

Property is replicated and calls the specified function when the value changes on the client.

NotReplicated

UPROPERTYSpecifier

Property is skipped during replication. Only valid on struct members or RPC service request parameters. Using it on a class property is a compile error.

Config

UPROPERTYSpecifier

Property value is loaded from and saved to the class config .ini file.

GlobalConfig

UPROPERTYSpecifier

Property is loaded from the global (base) config, not subclass-specific configs.

Transient

UPROPERTYSpecifier

Property is not saved or loaded. Reset to default on load. Use for runtime-only state.

DuplicateTransient

UPROPERTYSpecifier

Property is reset to default when the object is duplicated (copy/paste, Play In Editor).

TextExportTransient

UPROPERTYSpecifier

Property is not exported to text format (copy/paste).

NonPIEDuplicateTransient

UPROPERTYSpecifier

Property is only duplicated in Play In Editor, reset in all other duplication.

SaveGame

UPROPERTYSpecifier

Property is included in save game serialization.

SkipSerialization

UPROPERTYSpecifier

Property is not serialized at all but can still be exported to text.

NonTransactional

UPROPERTYSpecifier

Property changes are not recorded in the undo/redo transaction buffer.

Category

UPROPERTYSpecifier

Groups the property under a named category in the details panel. Use | for subcategories.

SimpleDisplay

UPROPERTYSpecifier

Property is shown in the simple (non-advanced) view of the details panel.

AdvancedDisplay

UPROPERTYSpecifier

Property is hidden behind the Advanced dropdown in the details panel.

NoClear

UPROPERTYSpecifier

Hides the Clear button on object reference properties in the editor.

Instanced

UPROPERTYSpecifier

Object property is a component-like instance. The referenced object is duplicated with the outer and is editable inline.

Export

UPROPERTYSpecifier

Object can be exported with its outer actor. Used for subobject serialization.

EditFixedSize

UPROPERTYSpecifier

Array elements can be modified in the editor, but the array size cannot be changed.

Interp

UPROPERTYSpecifier

Property can be driven by Sequencer tracks. Implies EditAnywhere and BlueprintVisible.

AssetRegistrySearchable

UPROPERTYSpecifier

Property value is indexed in the Asset Registry for fast queries without loading the asset.

ExposeOnSpawn

UPROPERTYMeta

Property is exposed as a pin on the SpawnActor node in Blueprint.

FieldNotify

UPROPERTYSpecifier

Enables the field notification system for this property. Used with MVVM and UI binding.

Getter

UPROPERTYSpecifier

Specifies a custom native getter function for the property.

Setter

UPROPERTYSpecifier

Specifies a custom native setter function for the property.

ClampMin

UPROPERTYMeta

Hard minimum value in the editor UI. The slider and text input will not allow values below this. Does not enforce at runtime — add your own clamping in code if needed.

ClampMax

UPROPERTYMeta

Hard maximum value in the editor UI. The slider and text input will not allow values above this. Does not enforce at runtime — add your own clamping in code if needed.

UIMin

UPROPERTYMeta

Minimum value for the editor slider. The value can still be typed below this.

UIMax

UPROPERTYMeta

Maximum value for the editor slider. The value can still be typed above this.

SliderExponent

UPROPERTYMeta

Exponent for logarithmic slider scaling. Values above 1 cluster precision near the low end.

Delta

UPROPERTYMeta

Increment amount when using the spinbox arrows in the editor.

FixedIncrement

UPROPERTYMeta

Fixed increment for value adjustments. The value snaps to multiples of this.

LinearDeltaSensitivity

UPROPERTYMeta

Sensitivity multiplier for linear delta changes when dragging the value.

Units

UPROPERTYMeta

Display unit label next to the value. Supports Centimeters, Meters, Kilometers, Degrees, Seconds, etc.

AllowedClasses

UPROPERTYMeta

Comma-separated list of classes allowed for a soft or object reference property.

DisallowedClasses

UPROPERTYMeta

Comma-separated list of classes not allowed for a soft or object reference property.

MetaClass

UPROPERTYMeta

Restricts a TSubclassOf property to subclasses of the specified class.

MetaStruct

UPROPERTYMeta

Restricts an FInstancedStruct property to instances of the specified struct.

MustImplement

UPROPERTYMeta

Object reference must implement the specified interface.

Bitmask

UPROPERTYMeta

Marks an integer property as a bitmask. Enables the bitmask editor widget. Only valid on non-float numeric properties. Pair with BitmaskEnum to name individual bits.

BitmaskEnum

UPROPERTYMeta

Enum to use for naming individual bits in a bitmask property. Requires Bitmask on the same property.

ArraySizeEnum

UPROPERTYMeta

Enum that determines the fixed size of a static array. Array indices map to enum values.

GetOptions

UPROPERTYMeta

Name of a UFUNCTION that returns a TArray<FString> to populate a dropdown for this property.

DisplayName

UPROPERTYMeta

Custom display name for the property in the editor details panel.

ToolTip

UPROPERTYMeta

Custom tooltip shown when hovering over the property in the editor.

ShortToolTip

UPROPERTYMeta

Short tooltip used in compact UI contexts.

EditCondition

UPROPERTYMeta

Boolean expression that controls whether this property is editable. Grays out the field when false.

EditConditionHides

UPROPERTYMeta

When combined with EditCondition, hides the property entirely instead of graying it out.

InlineEditConditionToggle

UPROPERTYMeta

Boolean property that shows as an inline checkbox next to the property it controls via EditCondition.

MultiLine

UPROPERTYMeta

FString or FText property uses a multi-line text editor.

AllowPrivateAccess

UPROPERTYMeta

Allows Blueprint to access a private property. Use with BlueprintReadWrite or BlueprintReadOnly.

MakeStructureDefaultValue

UPROPERTYMeta

Default value for a struct member when the struct is used as a function parameter.

TitleProperty

UPROPERTYMeta

Struct member whose value is shown as the array element title in the editor. Makes struct arrays readable.

EditInline

UPROPERTYMeta

Internal metadata set automatically by the Instanced specifier. Don't set manually — use Instanced instead, which also sets PersistentInstance and ExportObject.

ShowOnlyInnerProperties

UPROPERTYMeta

Struct property shows its members directly in the parent category without a collapsible header.

ValidEnumValues

UPROPERTYMeta

Comma-separated list of enum values that are valid for this property. Others are hidden from the dropdown.

InvalidEnumValues

UPROPERTYMeta

Comma-separated list of enum values that are invalid for this property. These are hidden from the dropdown.

BlueprintCallable

UFUNCTIONSpecifier

Function can be called from Blueprint graphs. The most common UFUNCTION specifier.

BlueprintPure

UFUNCTIONSpecifier

Function has no side effects and no execution pin. Implies BlueprintCallable. Use for getters and math.

BlueprintImplementableEvent

UFUNCTIONSpecifier

C++ declares the function signature, Blueprint provides the implementation. No C++ body.

BlueprintNativeEvent

UFUNCTIONSpecifier

C++ provides a default implementation (_Implementation suffix), Blueprint can override it.

BlueprintAuthorityOnly

UFUNCTIONSpecifier

Function only executes if the object has network authority. Silently skipped on clients.

BlueprintCosmetic

UFUNCTIONSpecifier

Function is cosmetic and won't run on dedicated servers. Use for VFX, sound, and UI feedback.

BlueprintGetter

UFUNCTIONSpecifier

Function serves as the Blueprint getter for a UPROPERTY with BlueprintGetter specified.

BlueprintSetter

UFUNCTIONSpecifier

Function serves as the Blueprint setter for a UPROPERTY with BlueprintSetter specified.

SealedEvent

UFUNCTIONSpecifier

Blueprint event cannot be overridden in child Blueprints. The implementation is sealed.

Server

UFUNCTIONSpecifier

Function is an RPC from client to server. Requires Reliable or Unreliable.

Client

UFUNCTIONSpecifier

Function is an RPC from server to the owning client. Requires Reliable or Unreliable.

NetMulticast

UFUNCTIONSpecifier

Function is an RPC from server to all connected clients. Requires Reliable or Unreliable.

Reliable

UFUNCTIONSpecifier

RPC is guaranteed to arrive. Uses a queue — overuse causes buffer overflow and disconnects.

Unreliable

UFUNCTIONSpecifier

RPC is best-effort. May be dropped under congestion. Use for frequent non-critical calls.

WithValidation

UFUNCTIONSpecifier

RPC must have a _Validate function that returns bool. If it returns false, the client is disconnected.

ServiceRequest

UFUNCTIONSpecifier

Function is a network service request.

ServiceResponse

UFUNCTIONSpecifier

Function is a network service response.

Exec

UFUNCTIONSpecifier

Function is callable from the in-game console (~). Only works on PlayerControllers, Pawns, HUDs, Cheat Managers, and Game Modes.

CallInEditor

UFUNCTIONSpecifier

Function gets a button in the details panel that calls it while in the editor (not at runtime).

CustomThunk

UFUNCTIONSpecifier

Function has a custom Blueprint VM thunk instead of the auto-generated one. For advanced use.

Category

UFUNCTIONSpecifier

Category under which the function appears in the Blueprint action menu. Required for BlueprintCallable.

DisplayName

UFUNCTIONMeta

Custom display name for the function in the Blueprint action menu and node title.

ReturnDisplayName

UFUNCTIONMeta

Custom display name for the return value pin on the Blueprint node.

ToolTip

UFUNCTIONMeta

Custom tooltip shown when hovering over the function in the Blueprint action menu.

ShortToolTip

UFUNCTIONMeta

Short tooltip used in compact contexts.

DefaultToSelf

UFUNCTIONMeta

Specified parameter defaults to Self (the calling object). Hides the pin when Self is valid.

WorldContext

UFUNCTIONMeta

Specified parameter is auto-filled with the world context. Required for static Blueprint Function Library functions.

HidePin

UFUNCTIONMeta

Hides the specified parameter pin from the Blueprint node. The parameter uses its default value.

AdvancedDisplay

UFUNCTIONMeta

Comma-separated parameter names that are hidden behind the Advanced dropdown on the Blueprint node.

ExpandBoolAsExecs

UFUNCTIONMeta

Bool return or output parameter becomes multiple execution output pins (true/false branches).

ExpandEnumAsExecs

UFUNCTIONMeta

Enum parameter or return becomes multiple execution output pins, one per enum value.

Latent

UFUNCTIONMeta

Function is latent — it doesn't complete immediately. Shows a clock icon on the Blueprint node.

LatentInfo

UFUNCTIONMeta

Specifies which parameter holds the FLatentActionInfo. Required with Latent.

DeprecatedFunction

UFUNCTIONMeta

Marks the function as deprecated. Blueprint shows a warning when the node is used.

DeprecationMessage

UFUNCTIONMeta

Message shown when a deprecated function is used in Blueprint.

DevelopmentOnly

UFUNCTIONMeta

Function is stripped from shipping builds. Use for debug and development tools.

BlueprintInternalUseOnly

UFUNCTIONMeta

Function can't be placed directly by users. Used for internal engine functions that drive async nodes.

CommutativeAssociativeBinaryOperator

UFUNCTIONMeta

Binary operator that allows adding extra input pins in Blueprint.

UnsafeDuringActorConstruction

UFUNCTIONMeta

Function is not safe to call during actor construction. Blueprint shows a warning.

BlueprintProtected

UFUNCTIONMeta

Function can only be called on the owning object in Blueprint, not on other references.

DeterminesOutputType

UFUNCTIONMeta

Specified parameter determines the output type. Used for functions with wildcard returns.

DynamicOutputParam

UFUNCTIONMeta

Output parameter whose type changes based on DeterminesOutputType.

AutoCreateRefTerm

UFUNCTIONMeta

Specified pass-by-reference parameters auto-create a temporary when unconnected in Blueprint.

KeyWords

UFUNCTIONMeta

Additional search keywords for finding the function in the Blueprint action menu.

CompactNodeTitle

UFUNCTIONMeta

Short title shown on a compact Blueprint node (like operator nodes).

HideSelfPin

UFUNCTIONMeta

Hides the self pin on the Blueprint node. Used for static-like functions.

Blueprintable

UCLASSSpecifier

Class can be used as a base class for Blueprints. This is inherited by child classes.

NotBlueprintable

UCLASSSpecifier

Class cannot be used as a base class for Blueprints. Use to block subclassing in BP.

BlueprintType

UCLASSSpecifier

Class can be used as a variable type in Blueprint. Does not imply Blueprintable.

Abstract

UCLASSSpecifier

Class cannot be instantiated directly. Must be subclassed.

Deprecated

UCLASSSpecifier

Class is deprecated. Instances are loaded but flagged as deprecated in the editor.

Transient

UCLASSSpecifier

Instances of this class are never saved to disk. Inherited by child classes.

NonTransient

UCLASSSpecifier

Overrides inherited Transient flag. Instances of this class are saved normally.

DefaultToInstanced

UCLASSSpecifier

All instances of this class are instanced by default. Used with EditInlineNew.

EditInlineNew

UCLASSSpecifier

Instances can be created inline in the editor from a property dropdown. Pairs with Instanced UPROPERTY.

NotEditInlineNew

UCLASSSpecifier

Overrides inherited EditInlineNew. Instances cannot be created inline.

Placeable

UCLASSSpecifier

Class can be placed in a level via the editor.

NotPlaceable

UCLASSSpecifier

Class cannot be placed in a level. Overrides inherited Placeable from parent.

Const

UCLASSSpecifier

All properties are const in Blueprint. Blueprint cannot modify this class.

Hidden

UCLASSSpecifier

Class is hidden from the class browser and other editor UI.

HideDropDown

UCLASSSpecifier

Class does not appear in class picker dropdown menus.

MinimalAPI

UCLASSSpecifier

Only the class type info is exported. Other modules can use pointers but not call functions.

Within

UCLASSSpecifier

Class can only exist as a subobject of the specified outer class.

CollapseCategories

UCLASSSpecifier

Properties are not grouped into categories in the details panel.

DontCollapseCategories

UCLASSSpecifier

Overrides inherited CollapseCategories.

AdvancedClassDisplay

UCLASSSpecifier

All properties default to AdvancedDisplay in the details panel.

ShowCategories

UCLASSSpecifier

Re-shows categories hidden by a parent class.

HideCategories

UCLASSSpecifier

Hides the specified categories from the details panel.

AutoExpandCategories

UCLASSSpecifier

Specified categories are expanded by default in the details panel.

AutoCollapseCategories

UCLASSSpecifier

Specified categories are collapsed by default in the details panel.

PrioritizeCategories

UCLASSSpecifier

Specified categories appear at the top of the details panel.

ShowFunctions

UCLASSSpecifier

Re-shows functions hidden by a parent class.

HideFunctions

UCLASSSpecifier

Hides the specified functions from the Blueprint action menu.

ClassGroup

UCLASSSpecifier

Groups the class under a named group in the editor class browser.

ComponentWrapperClass

UCLASSSpecifier

Actor is a wrapper that exists primarily to hold a component. Editor shows the component in place viewers.

SparseClassDataTypes

UCLASSSpecifier

Moves specified struct data out of the CDO into shared sparse storage. Saves memory for data that rarely varies per instance.

Config

UCLASSSpecifier

Class reads config properties from the specified .ini file.

DefaultConfig

UCLASSSpecifier

Config values are only saved to Default .ini files, not per-user overrides.

PerObjectConfig

UCLASSSpecifier

Each object instance has its own config section in the .ini file.

ConfigDoNotCheckDefaults

UCLASSSpecifier

Don't check default values when saving config. Saves all config properties unconditionally.

BlueprintSpawnableComponent

UCLASSMeta

Component can be added to a Blueprint via the Add Component button.

IsBlueprintBase

UCLASSMeta

Explicitly controls whether this class can be used as a Blueprint base. Overrides Blueprintable for specific cases.

ChildCanTick

UCLASSMeta

Child classes can tick even though the parent has ticking disabled.

ChildCannotTick

UCLASSMeta

Child classes cannot tick even if the parent has ticking enabled.

ShortTooltip

UCLASSMeta

Short tooltip used in compact class picker contexts.

KismetHideOverrides

UCLASSMeta

Comma-separated list of function overrides to hide from Blueprint.

BlueprintType

USTRUCTSpecifier

Struct can be used as a variable type in Blueprint.

Atomic

USTRUCTSpecifier

Struct is always serialized as a single unit. If any member changes, all members are serialized.

Immutable

USTRUCTSpecifier

Struct is immutable and implies Atomic. Used for engine-level types like FVector.

NoExport

USTRUCTSpecifier

UHT does not generate code for this struct. You must provide the declaration manually.

HasNativeMake

USTRUCTMeta

Struct has a C++ function for constructing it. Blueprint shows a Make node.

HasNativeBreak

USTRUCTMeta

Struct has a C++ function for breaking it into components. Blueprint shows a Break node.

HiddenByDefault

USTRUCTMeta

Struct pins are hidden by default on Blueprint nodes. User must expand to see them.

DisableSplitPin

USTRUCTMeta

Struct pin cannot be split into individual member pins on Blueprint nodes.

BlueprintType

UENUMSpecifier

Enum can be used as a variable type in Blueprint.

Flags

UENUMSpecifier

Enum is a bitflag enum. Values are powers of two and can be combined.

Bitflags

UENUMMeta

Enum values can be used as individual bit flags in a bitmask property.

UseEnumValuesAsMaskValuesInEditor

UENUMMeta

Use the actual enum values (not bit indices) as mask values in the editor bitmask widget.

DisplayName

UMETAMeta

Custom display name for an individual enum value in the editor and Blueprint.

Hidden

UMETAMeta

Hides the enum value from editor dropdowns. The value still exists in code.

ToolTip

UMETAMeta

Tooltip for an individual enum value.

BindWidget

UPROPERTYMeta

Binds a UPROPERTY to a UMG widget by name. The Blueprint compiler verifies the widget exists in the widget tree.

BindWidgetOptional

UPROPERTYMeta

Like BindWidget but the widget doesn't have to exist. The property is null if the widget is missing.

BindWidgetAnim

UPROPERTYMeta

Binds a UPROPERTY to a UMG widget animation by name.

BindWidgetAnimOptional

UPROPERTYMeta

Like BindWidgetAnim but the animation doesn't have to exist.

AllowAbstract

UPROPERTYMeta

Allows abstract classes to appear in the class picker for TSubclassOf or FSoftClassPath properties.

DisplayAfter

UPROPERTYMeta

Display this property immediately after the named property in the details panel.

DisplayPriority

UPROPERTYMeta

Numeric priority controlling display order within a category. Lower values appear first.

DeprecatedProperty

UPROPERTYMeta

Marks the property as deprecated. Blueprint shows a warning when referencing it.

MakeEditWidget

UPROPERTYMeta

Exposes an FVector or FTransform property as a movable widget in the viewport.

NoResetToDefault

UPROPERTYMeta

Hides the "Reset to Default" button for this property in the details panel.

NoSpinbox

UPROPERTYMeta

Numeric property shows a text field only, no spinbox or slider.

PasswordField

UPROPERTYMeta

FString property renders as a password field with dots instead of characters.

HideAlphaChannel

UPROPERTYMeta

Hides the alpha channel from FColor and FLinearColor property editors.

ForceShowEngineContent

UPROPERTYMeta

Asset picker shows Engine content even if the user has it hidden.

ForceShowPluginContent

UPROPERTYMeta

Asset picker shows Plugin content even if the user has it hidden.

ShowTreeView

UPROPERTYMeta

Class or asset picker uses a tree view instead of a flat list.

MaxLength

UPROPERTYMeta

Maximum character length for FString and FText properties.

FilePathFilter

UPROPERTYMeta

File extension filter for FFilePath properties in the file picker dialog.

RelativeToGameDir

UPROPERTYMeta

FFilePath picker outputs a path relative to the game directory instead of absolute.

ContentDir

UPROPERTYMeta

FDirectoryPath picker restricts to the Content directory.

AllowPreserveRatio

UPROPERTYMeta

Adds a ratio lock button for FVector properties so components scale together.

Untracked

UPROPERTYMeta

FSoftObjectPath or FSoftObjectPtr reference is not tracked by the asset registry.

AssetBundles

UPROPERTYMeta

Names the asset bundle this soft reference belongs to for PrimaryDataAsset loading.

ExactClass

UPROPERTYMeta

FSoftObjectPath picker only shows the exact AllowedClasses, not subclasses.

HideInDetailPanel

UPROPERTYMeta

Property is hidden from the details panel entirely. Still accessible in code and Blueprint.

NeverAsPin

UPROPERTYMeta

Property is never exposed as a data pin on Animation Blueprint and UMG nodes.

PinShownByDefault

UPROPERTYMeta

Property is exposed as a visible data pin by default on Animation Blueprint and UMG nodes.

AlwaysAsPin

UPROPERTYMeta

Property is always exposed as a data pin on Animation Blueprint and UMG nodes.

PinHiddenByDefault

UPROPERTYMeta

Property is exposed as a data pin but hidden by default. User can show it manually.

EditFixedOrder

UPROPERTYMeta

Prevents array elements from being reordered by dragging in the details panel.

NoElementDuplicate

UPROPERTYMeta

Hides the duplicate icon for array entries in the details panel.

DisplayThumbnail

UPROPERTYMeta

Shows a thumbnail preview of the selected asset next to the property.

ConfigHierarchyEditable

UPROPERTYMeta

Property can be edited in the config hierarchy editor.

ForceRebuildProperty

UPROPERTYMeta

Changing this property forces a refresh of sibling properties in the details panel.

GetAssetFilter

UPROPERTYMeta

Name of a UFUNCTION that filters which assets appear in the asset picker.

GetClassFilter

UPROPERTYMeta

Name of a static UFUNCTION that filters which classes appear in the class picker.

GetAllowedClasses

UPROPERTYMeta

Name of a UFUNCTION that returns allowed classes dynamically (instead of static AllowedClasses).

GetDisallowedClasses

UPROPERTYMeta

Name of a UFUNCTION that returns disallowed classes dynamically.

GetRestrictedEnumValues

UPROPERTYMeta

Name of a UFUNCTION that returns restricted enum values dynamically.

Multiple

UPROPERTYMeta

Numeric value must be a multiple of this value.

BlueprintThreadSafe

UFUNCTIONMeta

Function is safe to call from non-game threads in Blueprint. Used heavily in animation and audio.

NotBlueprintThreadSafe

UFUNCTIONMeta

Overrides a class-level BlueprintThreadSafe marking for a specific function.

BlueprintAutocast

UFUNCTIONMeta

Auto-inserts a cast node between the return value and first parameter types in Blueprint.

CallableWithoutWorldContext

UFUNCTIONMeta

BlueprintCallable function can be called without a valid world context object.

NativeBreakFunc

UFUNCTIONMeta

Function displays like a Break Struct node in Blueprint.

NativeMakeFunc

UFUNCTIONMeta

Function displays like a Make Struct node in Blueprint.

ArrayParm

UFUNCTIONMeta

Function uses the Call Array Function node pattern with wildcard array parameters.

ArrayTypeDependentParams

UFUNCTIONMeta

Parameters whose wildcard type is linked to the ArrayParm element type.

CustomStructureParam

UFUNCTIONMeta

Parameter is polymorphic in a CustomThunk function. Accepts any struct type.

MapParam

UFUNCTIONMeta

TMap parameter whose key/value types are determined at compile time.

MapKeyParam

UFUNCTIONMeta

Parameter whose type matches the key type of a MapParam.

MapValueParam

UFUNCTIONMeta

Parameter whose type matches the value type of a MapParam.

SetParam

UFUNCTIONMeta

TSet parameter whose element type is determined at compile time.

ScriptMethod

UFUNCTIONMeta

Static function is hoisted to an instance method on the first parameter's type in scripting languages.

ScriptOperator

UFUNCTIONMeta

Static function is exposed as an operator in scripting languages.

ScriptConstant

UFUNCTIONMeta

Static function is exposed as a constant in scripting languages.

DataTablePin

UFUNCTIONMeta

Parameter is a Data Table pin with row type inference in Blueprint.

HideSpawnParms

UFUNCTIONMeta

Hides the specified parameter from spawn pins on async task nodes.

CustomConstructor

UCLASSSpecifier

Prevents UHT from generating the constructor declaration. You provide it manually in the CPP block.

CustomFieldNotify

UCLASSSpecifier

Prevents UHT from generating the FieldNotify declaration. You provide it manually.

Optional

UCLASSSpecifier

Class may not be available in all contexts. Used for optional platform features.

GlobalUserConfig

UCLASSSpecifier

Config is saved to the global user settings directory, not the project.

ProjectUserConfig

UCLASSSpecifier

Config is saved to the project's user settings directory.

PerPlatformConfig

UCLASSSpecifier

Config can be overridden per platform in platform-specific .ini files.

Experimental

UCLASSSpecifier

Marks the class as experimental. Editor shows a warning badge.

EarlyAccessPreview

UCLASSSpecifier

Marks the class as early access preview. Editor shows a preview badge.

IgnoreCategoryKeywordsInSubclasses

UCLASSMeta

First subclass ignores all inherited ShowCategories and HideCategories specifiers.

DeprecatedNode

UCLASSMeta

Blueprint node for this class shows a deprecation warning when compiled.

DeprecationMessage

UCLASSMeta

Custom warning message displayed when a deprecated node is used.

ExposedAsyncProxy

UCLASSMeta

Exposes the proxy object on async task Blueprint nodes so you can bind to its delegates.

RestrictedToClasses

UCLASSMeta

Blueprint Function Library functions are only available to the specified classes.

ShowWorldContextPin

UCLASSMeta

Shows the normally hidden world context pin on Blueprint nodes for classes that don't implement GetWorld.

DontUseGenericSpawnObject

UCLASSMeta

Prevents using the generic Construct Object node. Class requires a specialized spawn function.

ProhibitedInterfaces

UCLASSMeta

Comma-separated interfaces that are incompatible with this class.

CannotImplementInterfaceInBlueprint

UCLASSMeta

Interface cannot be implemented by Blueprints. Only C++ classes can implement it.

246 of 246 specifiers