Using Photoshop to make variations on a theme.
4. Use an adjustment layer to make changes. In your Layers palette, it's the half-black, half-white circle, fourth from the left in the row of icons on the bottom. Click it and choose your adjustment. I'll use curves.
5. Make your changes, then click OK. Select the next layer, and once again draw a box around that layer's image using the Marquee tool. Then repeat Step 4-use an Adjustment Layer to do your tweaking. Keep going until you've done all four pictures. Then make a print. Take a look at your options, and pick your favorite.
6. Now apply the best modification to your final image. Move your Picture Package window to the right to see your original peaking out. Click and drag your chosen Adjustment Layer onto your original. Since you made a selection in Step 3, only a portion of your image will be affected.
7. Make sure the effect covers your whole image by going to your Layers palette and clicking on the black-and-white box (that's a mask, by the way) in the Adjustment Layer. Go to Edit > Fill, and under Use, choose White. Click OK, and now your whole fixed image shines through.
Always been nervous about masks? Well, you just used them! Every time you make an Adjustment Layer, Photoshop adds a mask. If you make a selection first, what's not selected gets masked off.