Where can I find this theme component？

[Moin]

@Elena

But how do you get “all category” not to display this box template

Then you choose a different style for the categories page in your site settings settings (admin -> all site settintgs -> desktop category page style)

You enable the boxes in the settings of the parent category like you did here:

@Elena

@Elena

How to create subcategory

You create a new category and select a parent category

Create a category in Discourse

This guide describes how to create a category in Discourse. Required user level: Administrator (or moderator if the moderators manage categories and groups setting is enabled) Categories are meant to hold a collection of topics that have similar subject matter. They include an abundance of configuration options you won’t find with the lighter-weight tagging feature. By default, category creation is limited to admin users. Moderators can be given the ability …