The whole layout is packed into the link itself — whoever opens it sees exactly this arrangement. Their edits stay on their machine until they share a link back.

This copy runs inside a frame, so the link above may not open on its own. To hand out links, host index.html anywhere static (or open the file directly) — or use Data → Copy data.

Every change already saves to this browser automatically. Save a named version to mark a point you can come back to, or save a file to keep it outside the browser.

Copy this to keep a file backup, or paste someone else's layout in and load it.