Outline (Child Theme)
Outline was created to have impeccable typography and use nearly every WordPress feature imaginable, such as the custom background feature and the nav menus system.
Outline is a child theme of the Hybrid parent theme. You must have it installed to use Outline. The child theme supports all the features of its parent theme. For more information on these features, see the parent theme page. If you're unfamiliar with how child themes work, check out the child themes tutorial.