Edit > Clone
Duplicates selected objects (Shortcut: Ctrl+D). This action creates an exact copy of the selected objects.
Cloning of octrees and reference layers is not supported.
Edit > Undo
Reverts the last action (Shortcut: Ctrl+Z).
TIP: Change the number of actions you can undo under Edit > Preferences > Settings > Undo list size.
Edit > Redo
Reverts the last undo operation (Shortcut: Ctrl+Y).
Edit > Delete Selected
Deletes selected objects (Shortcut: Delete).