Working on a selection layer is just like working on an image layer. That means that you can draw and erase a selection just like you would if you were laying down some line art.
So, there are a number of ways you can lay down and edit a selection area:
V By using any of the drawing tools (Pen, Pencil, Marker, Airbrush, or Pattern Brush tools) to outline or add effects to a selection area
*** By using the Marquee or Lasso tool to select the area, much like you would use on an image layer j** By using the Fill tool to fill In the area you've outlined or selected
V By using the Eraser, Marquee, or Lasso tools to remove excess parts of the selection area
What you create on the selection layer won't look exactly like a selection. In fact, it's just going to look like a green blob. (You can't easily tell in this black-and-white book, but in Figure 9-22, the character's hair is that green blob.) The idea here is that you aren't creating a selection so much as you're blocking off an area that you'll be using later on to create a image layer selection.
By creating a selection area, you can now tweak and adjust, add and remove as much or as little as you want. You can come back to it later and tweak as need be. And all of it's easier to do than if you try to do that with an image layer selection.
Block off areas on a selection layer that you'll later convert to an image layer selection.
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