Alt key

• While dragging an object or gumball widget, tap to Copy the object.
• Starts a combo selection if an object is not being dragged and an object snap is not active.
• Temporarily enables disabled object snaps.
• While dragging, press to suspend object snaps.
• Suspends Polyline, Curve, and InterpCrv autoclose.
• Makes arrow keys nudge selected objects.
• Toggles the Copy option in the command-line between Yes and No.