Merging a mask with its layer in Photoshop essentially applies the mask to the layer, permanently integrating the mask's effect into the image. Here's how to do it:
- Select the layer you want to merge. This should be the layer that has the mask you want to apply.
- Right-click on the layer and choose "Apply Layer Mask." This will permanently merge the mask with the layer.
This will effectively "flatten" the mask onto the layer, making the masked areas invisible. If you need to make further edits, you'll need to create a new mask on the merged layer.
Practical Insights:
- Merge Down: If you want to merge the mask with the layer below it, you can right-click and choose "Merge Down." This is useful for simplifying your layer stack.
- Non-Destructive Editing: If you want to preserve the ability to edit the mask later, avoid merging it with the layer. Instead, use the "Apply Image" function in the Image menu. This will apply the mask to the layer but keep it as a separate element.