Edit

Ctrl+Alt+Z – Undo [Undo editing actions to currently selected object(s)]

Ctrl+Alt+Y – Redo [Redo edits on current object(s)]

Shift+Ctrl+C - Copy objects [Copy objects to private clipboard]

Shift+Ctrl+V - Paste objects [Paste objects into selected class]

Shift+Ctrl+Alt+C - Copy class [Copy entire class into private clipboard]

Shift+Ctrl+Alt+V - Paste class [Paste class from clipboard]