This option is only for schools using onMessage for the public website.
When the Lightbox is engaged, any visitor to the website will see the message in a pop-up window centered on the page. The website is grayed out until the visitor acknowledges having read the message:
Once acknowledged, the emergency message remains visible at the top of the website until expiration date and time have been reached:
When Banner is engaged, a yellow horizontal bar displays for users logged in to the website:
Once the message is acknowledged as read, the yellow banner no longer displays.
Emergency Bulletin Lightbox Pop-ups
How do I setup emergency bulletins on my site?
Why did my emergency bulletin stay up after I expired it?
How to add a Emergency Bulletin with a Image and Style it.
How do I change the logo in my Emergency Bulletin?