What does the Clipping Mask function do?

The Clipping Mask function in Photoshop is primarily used to control the visibility of one layer based on the content of another layer beneath it. When a layer is clipped to another layer, the upper layer will only appear where it overlaps with the content of the lower layer. This means that any pixels in the top layer that fall outside the boundaries of the bottom layer will not be visible, allowing for creative effects and precise control over how layers interact.

For example, if you have a shape or a text layer acting as the bottom layer and an image layer above it, the image will only be shown within the confines of the shape or text. This technique is essential for designers looking to create complex visual compositions without permanently altering images or layers, as the Clipping Mask can be easily adjusted or removed.

The other choices describe functions that do not align with the specific capability of a Clipping Mask. Combining layers or enhancing image quality involves different tools and techniques, while applying a color adjustment affects overall visibility and perception rather than restricting it specifically to another layer's content.