There appears to be no way to hide the Full Screen toolbar when in Full Screen
mode. 

Applies to: Writer, Calc

Request: Could we make the Full Screen toolbar itself optional? That is, make a
way to hide it totally and completely?

Reasoning: My purpose in using Full Screen mode is to, well, be full screen,
with no toolbars or menus to take up space. Once I memorize the keystroke or key
combination for exiting Full Screen mode, this toolbar and its real estate are
useless.  

Additional Point(s): I see where I can delete the "exit full screen" button from
the toolbar itself - but the (empty) toolbar remains.  This isn't sufficient. 
Some have suggested work-arounds that amount to attempting to make the Full
Screen toolbar less obtrusive (rename the button to a short name, move toolbar
to side so that it's verticle), but these are not really satisfying as the
reclaimed real estate (if there is any) is marginal only. On my system, the
default is that the Full Screen toolbar is detached. Detached, it uses less real
estate than when docked, but in my opinion is still obtrusive.