Here is the video of the presentation that our colleague Roser made the other day at the offices on how to create a Moodle child theme.
In this workshop we will learn what a child theme is and its importance in the development and customization, especially graphics, of any Moodle. It will be explained what kind of customizations can be made with a child theme and some basic inheritance issues regarding the parent theme. Finally, a small workshop to show how to make a child theme of the classic theme.