What are face framing layers?

[juliaxena]

Hi all. I have all in one lenght hair. I dislike layers because they make my hair look thinner than it really is, and it is not on the thick side as it is. But I want kind of different and more modern look and I was wondering if shorter hair in front sides (not very short, still at APL at least) would make it look more playful. So I don't really want any hair as short as to not go under my face...so obviously I am not looking inte anything that really just frames my face. But I want to know what face framing layers are in order to figure out if they can be done at longer lenghts, and not in thinning way...just hair in the front sides a little shorter. OR would a simple U shape hemline be what I am looking for? Thanks all.