Advanced Pages
Capabilities shows leftover options one theme at a time. This section stacks those options until the runtime, the editor widget, and the theme locators have to work together. Every band is still an APB parent an editor can add. The frozen gallery and the commercial pages are untouched.
Use these URLs when planning a new composition: they record what the framework will do, what it will hide, and what it will not nest.
Open a stress page
The first card is an overlay on this page. The rest are ordinary internal links.
More Advanced Pages
These pages are composition stress tests. They are not the frozen gallery and not the commercial storefront.