Now you’ll work with another masking and selection tool, the Extract command, to make some difficult selections—some marsh grasses and a foxtail.
The Extract command provides a sophisticated way to isolate a foreground object from its background. Even objects with wispy, intricate, or undefinable edges can be clipped from their backgrounds with a minimum of manual work.
You’ll start with an image that consists of only one layer. You must be working in a layer to use the Extract command. If your original image has no layers (that is, has only a Background), you can duplicate the image to a new layer.
For an illustration of ...