Hello, I do a fair bit of photography with my P4, and did quite alot with my P3. One feature I miss is being able to press the Playback button on the P3 controller. It's now replaced with a Pause button on the P4, so if you take a snap shot, you're forced to touch the screen to review it. Doesn't look like the buttons are re-assignable. I'd like the option to do this in the future.