User blog comment:Dashyhardcore16/My Questions/@comment-27670950-20160723163053

To add a category on a page, you can click "Add Category" in the bar that contains categories and add one. Or, when you are in edit mode, go to the button to the left of the "Cancel" button and select "Categories," then type a new one in at the end of the list. Red categories are ones that people haven't created category pages for. You can go to a template and delete it by going to Edit>Delete.