[OSM-newbies] Help! JOSM has taken over my computer screen

[Mike N]

On 12/2/2012 4:35 PM, Charlotte Wolter wrote:
> I just began using JOSM, and, somewhere in the middle of doing edits,
> the Windows interface around the edges disappeared, and JOSM completely
> fills the screen. That means I can't switch back and forth between JOSN
> and Potlatch in my browser, which helps me located problems that I want
> to fix.

  F11 toggles in and out of fullscreen mode (or View / Fullscreen view 
from the menu will toggle)