Highlight message
To highlight a message, open the message creation form.
Navigate to
> Content
> Messages
and click the Edit button to go to Messages and the "Highlight" field:

Highlight with frame
When selected, a message is highlighted with a frame in the main congress color.
To send the message at the set publication time, click on the button:
Update— save but stay on the pageUpdate and close— save and open the list of messages