someone here tells me what they do. On my wireless keyboard I have 8 buttons in the upper left hand corner.
F1...with a *W* boxed in.
F2...with an *X* boxed in.
F3 ...with November 15th boxed in a desk calender looking icon.
F4...looks like a piece of notepaper with writing on it.
F5-F8...have lower case a-d boxed in with *presets* written underneath.

Okay...right hand corner F9-F12..with LCD functions underneath.
F9 says mode
F10 says set
F11 shows a bell
F12 says start and stop.

3 more buttons juxtaposed...one says insert...the other says print screen..I get that one obviously.
3rd button says pause/ break.

I do not have the manual ...my dog ate it....:) It is a Logitech.

Thank You!!