I just bought a copy of pse3 yesterday and trying to learn it. I have my background on the workspace, and a picture that i am working with. It keeps saying that the picture (layer) is locked. I can't crop it. I am so confused

Is the background paper supposed to be the background layer??, then the pic supposed to the the next layer, and as I add elements to the page are they supposed to be the 3rd, 4th etc layers??

How do I unlock the layer that is locked? Also, when I try to add my picture to the background paper, the background paper disappears, and the picture is on the workspace, when i click on the thumbnail of the background paper, the picture i want on it disappears. I am sorry to be a dummy, but i want to create a page so bad it hurts. Thanks for any help. Pat
