Viewport Split View Layouts
Open the Viewport Sizing menu (the ... button at the right end of the viewport toolbar) to switch a level viewport to a split-view layout.

Open the Viewport Sizing menu (the ... button at the right end of the viewport toolbar) to switch a level viewport to a split-view layout. Pick a One, Two, Three, or Four Pane layout.
To maximize one pane, use Maximize Viewport in that same Viewport Sizing menu (or its toolbar icon), then Restore All Viewports to return to the split layout.
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06/More Tips
Temporarily Change Actor PivotUtilize the ALT + Middle Mouse Button shortcut to temporarily change the actor's pivot point.
Viewport
Actors
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The Measurement ToolYou can access the Measurement Tool by pressing down and dragging the Middle Mouse Button within a level viewport that has been set to an Orthographic...
Shortcuts
Viewport
Viewport View Mode ShortcutsUtilize the CTRL + MMB + Drag shortcuts to quickly switch between viewport view modes. These are immensely useful for speeding up level design!
Viewport
Shortcuts
The Actor PaletteEnable the Actor Palette Plugin to gain access to a helpful tool that allows you to sample actors from another level.
Viewport
Plugins
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Atmospheric Sun Rotation ShortcutThe rotation of the Atmospheric Sun Light can be easily modified by holding CTRL + L and moving around the mouse.
Viewport
Lighting
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Freeze RenderingUtilize the FreezeRendering console command to freeze the rendering state of the actors within the Editor Viewport.
Viewport
Console Commands
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