>Nope, Its just a build in function.
>Selecting the menu item does the same thing..

I've discovered that too often some other app will use Ctrl+F1 (and ctrl+f2), so these would stop working in Fox. Citrix environment does that too.

I've discovered that ctrl-tab still does the job of ctrl+f1, so I'm using that in such cases, but that's the IDE where I'm using that. Don't really know how's it in an app.