N95 picture viewer:

2 – Scroll up (when zoomed)
4 – Scroll left (when zoomed)
5 – Zoom in (12.5%/25%/50%)
6 – Scroll right (when zoomed)
8 – Scroll down (when zoomed)
0 – Zoom out

Press and hold (in Standby):
Right selection key: Voice commands
Multimedia Key: Now Playing
1: Voicemail
2-9: shortcuts to address book you need to set up first
0: Web
#: Switches between General and Silent modes - not supported by all Operator Variants (when composing messages will switch between character and number input when held down) 12# (etc) in standby will dial the number held in location 12 on your SIM address book.