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The command line is a semitransparent toolbar that can float anywhere on the screen, allowing drawings to show through it. This recovers some of the vertical window area that was lost to the Ribbon. Hey, Microsoft, computer screens are getting wider, not taller! By default, the command line displays one command input line plus the last three input prompts, but you can change the number of prompts that are displayed.

As a command is running, the command line often displays several options that can be chosen during the command. You choose an option by entering the uppercase letter or letters shown in each option, such as Close or LWeight. It’s usually, but not always, the first letter. Some commands have more than one option whose name begins with the same letter, such as Entity versus Exit, so you enter E for Entity but X for eXit. For consistency, some options use a letter other than the first letter even if the current command doesn’t have conflicts. The most common example is eXit, which always uses X even if no other options in the current prompt start with E. Entering command option choices is not case-dependent. X or x will both work. However, ON and OFF must be entered in full because they are shown in all uppercase.