Once Upon A Dream

so, i can't use free transform at all in editing images? Does it destroy the images? Thank you for your reply.

I'm new, haven't posted before but have a question about free transform. If I start with the full length shot and then use free transform to get the up close image, how do I know if it will print ok? I tried the multiplying the h x w in pixels, but the pixels didn't change when i used the regular marquee on them after i free transformed. Is it ok to use free transform to "zoom" in on a pic instead of cropping it with the crop tool? I put one example and then the free transformed example.