... working on a selection layer.2. Use the Selection or Drawing tools to block off the area you want tomake a selection from.3. When the selection area(s) has been created, choose Selection ➪UseQuick ... different selection, highlight the selection layeryou want to use.The old selection is converted to match the active selection layer.5. Repeat as necessary.6. When you’re all done, choose Selection ➪Use ... choose Selection Convert Layer to Selection (Ctrl+F; Ô + F on the Mac), which converts all visible selection layersinto a selection. When converted, you see the familiar marching ants selection...