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Undo a Single Action
The simplest method of backtracking is to use the UNDO or U commands to
undo a single action. Many commands include their own U (undo) option so
that you can correct mistakes without leaving the command. When you are
creating lines and polylines, for example, enter u to undo the last segment.
NOTE By default, the UNDO command is set to combine consecutive pan and
zoom commands into a single operation when you undo or redo. However, pan
and zoom commands that are started from the menu are not combined, and
always remain separate actions.
Undo Several Actions at Once
Use the Mark option of UNDO to mark an action as you work. You can then
use the Back option of UNDO to undo all actions that occurred after the
marked action. Use the Begin and End options of UNDO to define a set of
actions to be treated as a group.
You can also undo several actions at once with the Undo list on the Standard
toolbar.
Reverse the Effect of Undo
You can reverse the effect of a single U or UNDO command by using REDO
immediately after using U or UNDO.
You can also redo several actions at once with the Redo list on the Standard
toolbar.
Erase Objects
You can erase any object that you draw. If you accidentally erase the wrong
object, you can use the UNDO command or the OOPS command to restore
it.
For more information, see
Erase Objects (page 231).
Cancel a Command
You can cancel a command without completing it by pressing Esc.
230 | Chapter 6 Create and Modify Objects