All of the doodle artwork in Make Yourself Clear was created with Explain Everything using an iPad Pro and Apple Pencil (2nd Gen.). I had actually done one entire set of doodles, but seeing them in context with the book and in print made me realize that a thicker, heavier style would translate better and also be more discernible when smaller versions of the images might be used.
In order to have consistency, I started with a blank project and set up the pen and highlighter thicknesses and colors to the ones I wanted to use. I also had to think about framing the doodles and whitespace around them so that if it was a simple doodle - like a single object - it would not be much larger and thicker in comparison to doodle with multiple components.
In the screenshot above, you will notice the first iteration of one particular doodle (about communication channels) and the second iteration. I think both work well digitally, but the bottom one translates better to the size and medium of our book.