Undo [-]

Toolbar / Icon:
       
Menu: Edit > Undo [-]
Shortcuts: Ctrl+Z (Mac: ⌘Z) | O, O
Commands: undo | oops

Description:

This tool takes back the last change of the drawing. QCAD can take back more than one command. For example if you have just created a line and a circle and you want to undo both, use the undo command twice.