Undo/Redo
After making any
change to you existing design, if you decide to revert back
to the old design,
you can perform Undo action. You also can redo the undo actions.
To perform
undo action: click on the "undo" tool button, or Ctrl+Z
To perform redo
action: click on the "redo" tool button, or Ctrl+Y
You can perform up to 5 levels of undo/redo
.