If your inventory is large enough and complex enough, you may want to create categories within categories.
To do this, create a category normally, and simply use our drag & drop functionality to assign the new category as a subcategory of an existing one.
Next, navigate to the main Category Page.
Choose the subcategory by clicking and holding it on the 6 Dot icon to the left side of the Category.
Drag the Category slightly below and slightly right of the main category you wish it to be under.
You will see a line extending down from the main category to your subcategory. Release your mouse button and your category is now a subcategory.
Click Save at the top left of the page.
Make sure you can see the line back to the main category before releasing the subcategory.
For additional details, see "Categories App: The Categories List".