I've made a screen and that has the external candidate event info and standdown event info. On here is also some controls to cancel stand downs and make stand downs for times: 1 hour, 1 day, indefinite. This will illuminate a bright orange STAND DOWN on this screen, and the usual orange stand down light will be visible in the control room next to the lock clock. More of this info might migrate to the ops overview eventually.

This screen is availble from the OPS dropdown on the sitemap as "EXT ALERT STAND DOWN"