Viewport Split View Layouts
Click on the top-right button within a level viewport to quickly switch to a split view layout.

Click on the top-right button within a level viewport to quickly switch to a split view layout. Press on it again in the desired layout panel to maximize that view.
The desired split-view layout can be set via the Viewport Layout Options Menu found in the top-left of the viewport.
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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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