I was trying to create a face and I wanted to adjust the position of the different bits of the face that I had drawn on different layers (nose, mouth etc.) but I can't move them. I'm very new to using photoshop so there's probably just a silly mistake that I'm making!
c.pfaffenbichler is correct. All you have to do is press the letter Q to get in and out of quick select mode. Anytime you see that transparent red highlight on a layer, it's an indicator that you are in the quick select mode.