When you need to apply a selection that you've previously saved ”that is, when you need to reselect a previous selection ”you can load the selection.
Click on Select . The Select menu will appear.
Click on Load Selection . The Load Selection dialog box will open .
Click on the down arrow next to the Channel box. The list of saved selections will appear.
Click on the desired selection . It will appear as the Channel selection.
Click on OK . The Load Selection dialog box will close, and the selection marquee will appear in the file.