I have PS Elements, I went to my toolbar click on IMAGE / then TRANSFORM / then PERSPECTIVE... it will tell you you are creating layers, and you have an option to name it... i just say okay and stick with what ever default is there Ex: Layer 0 ( because i don't work in more than 1 layer, as I don't know much about them) it then places a square around your picture and you can "tug" at the corners....
try it!