To apply an image to a layer mask in Photoshop, copy the image and paste it into the layer mask itself. You can access the layer mask by holding the Alt (Option on Mac) key and clicking on the layer mask thumbnail.
Here's a step-by-step guide:
- Copy the image: Open the image you want to use as a mask. Select the entire image (Ctrl+A or Cmd+A), and copy it (Ctrl+C or Cmd+C).
- Select the layer mask: In the Layers panel, locate the layer that contains the layer mask you want to edit.
- Access the layer mask: Hold down the Alt key (Windows) or Option key (macOS) and click on the layer mask thumbnail. This will display the layer mask itself in the document window. You'll see a grayscale representation of your mask.
- Paste the image: Paste the copied image into the layer mask (Ctrl+V or Cmd+V). The image will now be visible within the layer mask.
- Adjust the image (optional): You may need to adjust the size, position, or contrast of the pasted image within the layer mask to achieve the desired effect. Use the Move tool (V) to reposition the image and use Levels (Ctrl/Cmd + L) or Curves (Ctrl/Cmd + M) for contrast adjustment.
- Exit the layer mask: Click on the layer thumbnail (next to the layer mask thumbnail) in the Layers panel to return to editing the layer's content. The layer mask will now use the pasted image to determine the layer's transparency.
In summary, the key steps involve copying your desired image, accessing the layer mask by Alt/Option-clicking the layer mask thumbnail, and then pasting the image directly into that mask area within Photoshop.
