Assertion: key's function | /r/HasProperty | key
Facets:
Source sentences:
text: IBM use of function keys dates to the IBM 3270 line of terminals,[citation needed] specifically the IBM 3277 (1972) with 78-key typewriter keyboard or operator console keyboard version, which both featured 12 programmed function (PF) keys in a 3×4 matrix at the right of the keyboard.
text: macOS assigns default functionality to (almost) all the function keys from F1 to F12 , but the actions assigned by default to these function keys has changed a couple of time over the past history of Mac products and corresponding Mac OS X versions[circular reference].
text: on some macOS versions, it's said that function keys F14 and F15 are mapped by default to decrease/increase contrast (although nothing is labelled on these keys on Macintosh keyboards).