WP Ultimo is made up of a whole load of functions and database queries. It has hooks and filters that will allow you to modify or add new code to existing functions.
We created a list of these hooks and filters as a reference to help advanced users further customize their network. You can access the list from Github by clicking the link below.
https://github.com/next-press/wp-ultimo-hooks-and-filters/blob/main/wp-ultimo.md