TOP VIEW:
Press start to pause the game, then press the start button again and hold 
for ten seconds, press L1 and start at the same time, it will then change to 
the top view.

SIDE VIEW:
If you want to change to side view, it is more or less the same,repeat the 
steps above for the top view, but after holding the start butten for 10s, 
press L2 and start instead.