Embedded whiteboard on a published KB page cuts off site header when expanded

What is the challenge?

When an embedded whiteboard on a published knowledge base page is expanded, it cuts off the site header.

Additionally, there is no way to exit the expanded whiteboard without hitting the back button on your browser.

What is the impact?

Can't exit the whiteboard.

Describe your idea

Make whiteboards expand on published pages the way they do internally.