AutoCAD® 2012 and AutoCAD LT® 2012 Essentials: Autodesk® Official Training Guide

Canceling, Erasing, and Undoing

Making mistakes in AutoCAD is entirely acceptable if you know how to cancel, erase, and/or undo what you've done wrong. The following exercise will show you how to do all three:

1. Type L and press Enter. Click two points on the canvas and then press the Esc key; the LINE command is terminated but the single segment you just created remains. The Esc key will get you out of any running command or dialog box.
2. Type E and press the spacebar. Click the line created in step 1 and then right-click; the segment is erased.
3. Click the Line tool in the Draw panel, click four points on the canvas (making three segments), and then ...