F2 Function

[lynene]

my F2 function is not working properly when I hit F2 to change something/update in that cell all I get is a black rectangle in the upper left with a "bar" in it that I can adjust up and down and I've never seen this before how do I correct it back to the way it was?

[#2]

@lynene 

Do other function keys work?

Does your keyboard have a Fn key (if present, you'll find it between the left Ctrl key and the Windows key)? If so, try pressing Fn+F2.