These things are covered in the SFC 3 game manual..
however briefly
home / Page Up / Page Down / and END are camera angles...
F1-5 are different camera modes
d removed the control panel and restores it.. F9 and F10 are your shield graphics
F12 is screen shot...
zoom in and out is the = and - keys
the easier way is to open the manual to the keyboard layout and see what each key does in game.