You can paint with the coloring book color to create coloring pages where the shapes will constrain the paint tools.
The Coloring Book Color is the icon at the bottom of the color palette with a small sun on it.
This is sort of like a magic color that the other colors can't paint on. For example, if you draw a closed shape and paint inside, the paint won't spill outside, even with the paint brush tool.
When you draw an image with this color selected, it looks similar to any other painted outline.
But when you use the paint brush, or even spray can, it will constrain to the space where you begin coloring.
You can really see how this works if you start painting outside the lines and cross over your image.
Try using the coloring book color and the symmetry brush (radial works best) to draw mandala-style coloring pages.
