A reader writes, "Help. I've got red X marks on my layer masks. What did I do and how can I get rid of them. My masks aren't working."
Those red X marks, recreated for you in the above image, are a visual reminder that your masks are disabled. Here's how it works.
- Click on Layer>Layer Mask>Disable ... or
- Shift+Click the layer mask thumbnail (disable and enable) ... or
- Ctrl+Right Click on the mask and select disable/enable layer mask from the context menu.
As with many things in Photoshop, there is more than one way to do the same thing.
I know that the red X marks can be a bit shocking. Hopefully, this will help if you've accidentally disabled your masks.