Unreal Engine – Editor Overview
Place New Objects
Window> Modes> Place> Geometry> DRAG AND DROP the game object thumb over the 3D Viewport
OR
Window> Content Browser> DRAG AND DROP the game object thumb over the 3D Viewport
Move/Scale/Rotate/Setup Objects
LMB select the object and use the top right small icons to select transformations tools, after that use the handles on screen
OR
1. Window> Scene Outliner> click over the object list to select
2. Window> Details> setup
Static Mesh Editor
RMB over a mesh> (home icon)Edityourmesh
Parenting objects
RIGHT COLUMN> Scene Outliner> DRAG AND DROP an object over another object, the dragged object will be the child of the second one.
Material Editor
RIGHT COLUMN> Details> Materials> DOUBLE CLICK over material preview
Move Camera View
LMB: rotate camera right left and move forward / backward
MMB: move left / right / up / down
Mouse Whell: zoom in / out
RMB: look at right / left / up / down
RMB + WASD: look and move like a FPS
ALT + LMB: orbit around the selected object