A [Shared] Folder of Personal Style Files.
If it would be possible to setup such directory in a project of github, then import it. This directory could be shared also between users.
Hello, thanks for the idea. Pls see the comment: https://papeeria.uservoice.com/admin/forums/192864-general/suggestions/9405747-a-shared-folder-of-personal-style-files#/comments
At the moment being you can create your own template with the required classes and create new documents from the template.
We consider allow for customizing TeX environment in the future, but that's going to be a premium feature available to paying users. In fact, if a paying user really wants to, we can add the required classes to his TeX environment manually.