Essential Shortcuts
right click+hold+drag - rotate
middle mouse - pan
right and left click +hold+drag - moves up and down
W
Selects the Move Tool.
E
Selects the Rotate Tool.
R
Selects the Scale Tool.
V
Toggles vertex snapping which allows you to snap to the vertices of other geometry in the world.
ctrl+s - save
G
Toggles Game Mode, which causes the viewport to render only what would be seen in-game.
Unreal Engine - Shortcuts
https://docs.unrealengine.com/en-US/Engine/UI/LevelEditor/Viewports/ViewportControls/index.html
