Hi Henning,
Thanks for reaching out!
Just to make sure I’m understanding correctly, are you trying to add categories to tickets or events? If you are using WooCommerce, you can add categories to the tickets by editing them in WooCommerce.
If you are adding the categories to the events and want the tickets to show up in the list view without having to click on each event to see the tickets, then you would need to customize the template for the calendar view that you want to add the tickets to. Our themer’s guide has instructions on customizing templates.
We are limited in the amount of support that we can provide for customizations, but if you get stuck or have any questions, please let me know – I’ll be happy to point you in the right direction!
Thanks,
Jennifer