I tried "Search" for this before posting, but "Search" is currently unavailable. I am new to digital photography and thought it best to play with iPhoto before going any further.
Most of it is intuitive and easy to follow (I come from 60 years of photography, 30 of it as pro and retired and now I'm a beginner again.) Can you save the original, modify it and then compare the two. I know one can return to the original but I'd like to see them side by side. I tried copy & paste but that didn't work.