Click Image ---> Adjustments ---> Treshold. verplaats a little cursor to increase/decrease visibility.
Click on your background image on the panel on the right and instead of normal choose screen,lighten of similar.
Before u do that, u need to unlock background layer. You're going to do that door double clicking little lock on the background layer. Then add textures.
In this Elena photo, I used a link link geplaatst to this spot.