Transform option not available after adding Layer
I created a new layer so that I could create a guide at an angle as shown in the screen shot below. I need to straighten the top of the door and was going to use Transform>Skew, but for some reason, Transform is not available now, rather "Transform Points" and "Free Transform Points" have replaced it. I am on the Background Layer and not the Guide Layer but I still can't access Transform. Why not, and how can I get it back? Thanks.

