I like to use small decorations to enhance a book page, just a little something with a light colour. In printed books, they call them margin drawings.
I started with a simple ink drawing in a notebook. Then I took a photo with Adobe Shape and sent it to Photoshop. In Photoshop, I enlarged shape and saved it in psd.
Within Corel Painter I captured the shape as a brush dab. With the advance brush tool, I made a few more changes and saved the variant in my personal custom brush category.