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[JammyDodger]

Topics can only belong to one category/subcategory. Have you considered using Tags?

It’s Time We Talked About Tags

Admin guide to tags in Discourse

If you haven’t read it already, It’s Time We Talked About Tags provides an overview of how tags can be used as an organizational tool. Configuring Tags Tag settings can be found in your admin panel under the “Tags” section of your site settings. [tag-site-settings] Tagging is enabled by default. To disable tags, ensure that the tagging_enabled setting is unchecked. Creating and applying tags Tags are created upon first usage. When composing or editing a topic, a us…