https://webdesign.tutsplus.com/courses/building-a-wordpress-theme-documentation-template
Creating a good WordPress theme means more than just good aesthetics and well-written code. It must also be well documented, especially if you’ll be handing it over to your clients where they’ll be the ones installing and maintaining it

Creating unique documentation for each WordPress theme is counter-productive, so in this course I’ll show you how to plan, design and build a documentation template that you’ll be able to reuse on your WordPress themes. We’ll be using Sketch for the design phase, and ZURB’s Foundation for Sites to build the final product.

Do you want to learn WordPress development from start to finish? Check out our learning guide: Learn WordPress Development.