OK .. with the situation as shown below .. Using Photoshop PS5
At the last minute I wanted to change the color of the red frame, using a hue-saturation layer. But because the frame and hue-sat layer are both clipped (along with Layer 1) to the Photo layer, Layer 1 will also change colors .. which I DON'T want. I worked around it by merging the hue-sat and frame layer together, but is there a way to accomplish this and keep the hue-sat layer available for later modification?