Layouts
The Layouts Library is a browsable set of seeded page layouts and reusable components used by the Add Page flow. It lives under Settings > Layouts, organized into System Layouts, Custom Layouts, and Page Components.


Note
Layouts are a browse-and-copy library, not a full CRUD screen -- there's no in-place Edit or Delete for a layout here. Preview and Copy are the two available actions.
Preview
Click Preview on any layout or component to open its real rendered markup in a new tab -- header, footer, and any sample content it ships with, exactly as a page built from it would start out.

Copy
Click Copy on a layout to open the same builder used when adding a page, pre-filled with that layout's markup, framework, and description as a starting point.

The Preview panel on the right updates live as you edit. Click Save Layout when you're ready, or Cancel to discard it.