On my iPhone, if you are in photo mode or video mode and want to switch to manual, you click on icon with three bars, which opens a window on the left to manually adjust the ISO or aperture, But on my iPad2, I only have option between P(program) and M(manual) don't seem to be able to toggle between program and auto!!!How do you toggle betwen this two?  

Try to tap P or M with your finger and see if that gives you control...

I'm I have to find out how to do the two second full-screen preview after you take a pic. It's in quick review settings which my app doesn't have.