On the 1st day of Christmas
I learnt this in IT:
F1 is the help key
On the 2nd day of Christmas
I learnt this in IT!
F2 is rename-
And F1 is the he-e-elp key
On the 11th day of Christmas
I learnt this in IT!

F11's fullscreen
F10 does nothing
9 does nothing
8 does nothing
7 does nothing...
F6 does nothing!
F5 refreshes the screen!
F4's the URL
F3 finds files
F2 is rename
And F1 is the help key!

And on the 12th day of Christmas
I moved them all around
Now F12's the URL
F11 finds files
F10's rename
F9 turns the lights off
8 fires rockets
7 makes you pregnant
6 still does nothing
F5 goes ping!
F4 gives you AIDS
F3 cures AIDS
F2's disappeared
And F1 is the help key!