Here is one of my favorite tricks using the UNDO command….
Lets say you have to make MAJOR changes to your drawing, but you are not sure if it will produce the desired result causing you to UNDO numerous times to get back where you started.
Here is a little trick:
1. Enter the UNDO command, and enter M at the command prompt for “MARK”
2. Proceed with your desired changes as necessary.
Now, lets assume the changes didn’t have the desired result, and you have to go back to where you started (i.e. when you entered M for Mark).
1. Enter the UNDO command
2. Enter B for BACK (and press enter)
How useful is that??