This reviews the layout and customizations of the Category template.
When you click Edit Page on a Category template, you'll see the same options for customization that you had with Portfolio templates. When you go to add subpages to the Category page, you are restricted to only selecting a Guide to stay consistent with the architecture framework structure:
Once you select Guide and then click Create new page, it will open in edit mode and give you the same options that Portfolio and Category have. Once you've added a Guide, you'll see the layout differs than the Portfolio page on the Category page.