Save for every screen stores the settings on Cloudflare, so any device
that opens the dashboard gets them, and screens already running pick the
change up within a minute. It needs the PIN, and it needs the one time
storage step in the README.
Save and open keeps the settings in this browser only. Useful for
trying something without changing what everyone else sees.
Times use whatever timezone the viewing device is set to. On a UK machine in
August that means BST.
This page is not linked from anywhere except the small cog in the top right
of the dashboard. Reach it any time at /settings.