TIP: Many AutoCAD commands require you to press ENTER to complete the command. You know you are no longer in an AutoCAD command when you see a blank command line.
Reissuing the Last Command
The last used AutoCAD command can be re-entered by one of the following three methods of ENTER. The ENTER key on the keyboard will always act as ENTER, the SPACEBAR and RIGHT MOUSE will act as enter most of the time (exceptions include placing TEXT). 1. Press the ENTER key on the keyboard or 2. Press the Space bar on the keyboard. or 3. Click the right mouse button.