Use layers to make changes to an image without modifying the content on other layers. Use multiple layers for drawing complex sketches or to test variations of a design.
Check out these articles to find out what you can do with layers and how to do it:
- How do I use layers?
- How can I organize, merge, clear, or add an image to a layer?
- Can I group layers together?
- How do I blend layers?
- How can I change the transparency of a layer?