Saving a Selection as a Layer Mask
Photoshop CS6 Tutorial
How to Save a Selection as a Layer Mask in Photoshop
Selections can be made with the numerous tools in Photoshop. Once you make a selection, it can be saved as a Channel, a Layer Mask or converted to a Path.
In this topic we will create a selection, then save it as a Layer Mask.
Open a new document in Photoshop (File > New). Set the size to 500 pixels by 500 pixels at 72 ppi. Set Background Contents to White.
Add a selection to the document by choosing the Elliptical Marquee tool (m key) and click-dragging in the workspace.
Press Option/Delete (PC - Alt/Backspace) to fill the Ellipse with the Foreground color.
Click the Add a Mask icon at the bottom of the Layers panel. The Background layer is converted to a Transparency layer and a mask is added. The white areas of the mask correspond to the opaque sections of the layer. The ellipse is no longer selected.
To load your mask as a selection, Cmd-click (PC - Ctrl-click) the Mask icon in the Layers panel.