Child URLs inherit their parent's page customizations. That's great. You set your default page customizations at the top level, it propagates down through the entire URL tree.
But you can change them, you can override the parent's behavior and have a child have different settings.
But after a few customizations, it becomes unclear which URLs have a disinherited set of settings and which are using the defaults. Obviously, clicking through each URL and checking doesn't scale particularly well.
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