Hi nanaatplay02

F11 in keyboard

thank you

for more shortcus see : Keyboard shortcuts - Perform common Firefox tasks quickly

See also:

• https://support.mozilla.org/kb/how-to-use-full-screen

I had been trying control + F1; will try this instead. Appreciate your help.

Unfortunately F11 doesn't work either. These are mainly PDF files, but they refuse to open completely without my resizing them every time and some refuse to open completely anyway--like bank statements

Whadaya using to display PDF files?

Nuance PDF Converter Professional 7