CNCSimulator Pro

user guide

12.2.7. Undo / Redo

While drawing guide objects and creating contours, you can always use Undo and Redo if you do a mistake or change your mind. The keyboard shortcut for Undo is CTRL + Z. For Redo, the keyboard shortcut is CTRL + Y.
You can also find Undo and Redo in the Edit menu.
While tracking a contour, there is always a possibility that the tracker takes another way than what you intended (because there are one or more possible alternative ways it can take). In that case, just Undo the last click, so that the tracker will back off to the previous position, and click at another position helping the tracker to take the right way.
Oops! Here we went too far. Press CTRL + Z and click at the intersection of the circle and the line.
See video: