Change contrast/colors, etc to multiple selected images

Question

I have a simple request, but can't seem to find the answer online.

I want to change the colors of each of these green tiles to red.

When I selected all images, my Image > Adjustments tab is grey'ed out.

I know I can do this if I just merge layers, but I'd like to keep them separate.

Answer 1

You can create an adjustment layer like this:

1. At the bottom of the layers panel, click the adjustment layer icon ()

2. Choose Hue/Saturation

3. Adjust the colors

This will work for what you need to do. However, if you have layers below the adjustment layer, they will also be affected.