When you create picture on a software on a computer you are going to have layers while you work on whatever picture you create no matter what. In the book “Graphic Design the New Basics” By Ellen Lupton and Jennifer Cole Phillips on pg. 141 they claim that layering came from a long history in the traditions of mapping and musical notation and that layering means you overlap other pictures in different levels to get the whole picture but keep their own identities. Colors has their own layers depending on what it’s used on and layers could be independently filtered, transformed, masked, or multiplied while adjustment layers could change the levels and curves that can be revised or discarded at any time. By using layers’ designers can create different variations of a design by turning on or off a layer and mess with a layer without messing up the whole design.
In Lynda Barry’s graphic novel “What it is” she created many different layers on each page to come up with the whole page to look like it does. Using page 69 in the book as an example, this page has multiple cut outs of different pieces of paper and some of those papers are on different layers. She uses what looks like Cut and paste for those pieces of paper where they have been scanned in and pasted on the page having it look like it was physical layers turned into digital layers so she uses mixed media. There’s also some drawings and cut up animals as well that are as well on different layers where it’s noticeable in the rabbit creatures on the bottom. It was important for her to do this here because it would have been a mess if it wasn’t having it the colors be not as precise and that it made it easier for her to finish her work.