The Copy command makes duplicates of the selected objects.

The Cut command deletes objects from the model and places them in the Clipboard.

The Paste command inserts objects from the Clipboard.

The Undo command reverses recent changes to objects.

The UndoSelected command reverses recent changes for a selected object only.

The UndoMultiple command displays a list of recent commands to reverse.

The Redo command steps back through geometry changes activated by the Undo command