To Undo a recently made change in drawing:

Using the keyboard

: Press Ctrl+Z from the keyboard. Repeat as necessary to undo additional changes in reverse order.

 

Using the Mouse:

: Go to the  Edit menu and select ÄUndo

or

: Go to the File Toolbar and select the icon button

 

 

To Redo a recently undone change in drawing:

Using the keyboard:

: Press Ctrl +Y from the keyboard. Repeat as necessary to redo additional undone changes in reverse order.

 

Using the mouse:

: Go to the Edit menu and select ÄRedo

or

: Go to the File Toolbar and select the icon button