Telling the style guide to change what's in your header, nav, or footer now actually does that. Before, a request like "remove the Log in button" would adjust colours and spacing while leaving the button right where it was. Now the header and footer are rewritten to your instruction, and every page re-renders against the result — the style guide and page layouts stay untouched.
Headers no longer carry over buttons copied from your existing website. That pill-shaped button with no destination is gone from saved headers, new designs won't include one, and the header designer no longer treats it as a reference point.