But if you're after getting more screen real estate, and you've pretty much got your commands memorized or know which palette your commands are on, you can get more space by double clicking any ribbon tab (Home, Insert, Annotate, etc). 

 

The first time you double click one of those tabs the screen will expand by showing you only major palette categories (Draw, Modify, Layers, etc).  The second time you'l get more room still as the palette blocks will reduce to tabs.  The third time they'll go entirely.  Rolling over the Home/Insert/etc tab at this point will expand the menus.  The fourth time you double click world order is restored.

 

You might combine this with moving the command line to the top of the screen.  But that status bar is going to stay where it is.

 

Dave.