Frankfurt may appear to have very little adjustment options on the surface, but it is quite a different story under the hood. The theme comes with a great selection of filters that will be a great help to you when setting up a child theme.
We have included almost all the functions this theme has to offer in this API, so that you can access everything cleanly from outside the theme. A quick look at functions.php will tell you which filters are called up where.
Basic info on filters and hooks in WordPress can be found on the relevant codex pages. To say it simply, a filter is an interface point for changing a specific function task as in:
In the interest of clarity, we have divided the filters in this documentation into a WordPress and a WooCommerce section. Additionally, you will find in the sections MultilingualPress and WooCommerce German Market information about the two plugins, including links to their documentation.