Master-Detail Views (Events, Shop, Food Menu, Recipe, Gallery, Radio, and General, an empty one that you can customize according to your needs) all have the option to display varying, dynamic content. You can access and manage their section content by clicking the Database icon on the relevant section:
By clicking on this database icon, a new window will appear to add or edit your content:
Clicking on the Folder icon will open the categories screen for the specific section:
By clicking on this folder icon, a new window will appear, where you can add and edit your categories for the section.