To really maximize your work area, try CLEANSCREEN. You can use Ctrl+0 (that's a zero), or go to ToolsClean Screen, or click the faint blue square icon at the very bottom right of the AutoCAD program window to maximize your entire work area. The only thing that will show is your top Pull-down Menu, your Command Line, and/or your Layout Tabs, maximizing the drawing area as much as possible. Of course, you could also turn off the command line and just work with Dynamic Input if you wanted to be even more minimal. These command options work as a toggle, so simply repeat the action to restore the full interface.
If you are a customized keyboard command type of person, the command is CLEANSCREENON and CLEANSCREENOFF so you can easily add it into your ACAD.PGP file complete with your personal Command Alias.