How do i msg someone if i only now their screen name

How do i msg someone if i only now their screen name?

click on their avatar/icon. Look under it. If you don't have that, can't help you. Thought they were going to fix that, but if they did *shrugs

Unless the person has posted or is in the game you are in there is no way to send them a message.  To check to see if they have messaged before, go to the forums and input the screen name in the search field.  If they have posted you will be able to enter the forum they posted in and click on their avatar. If not, Im apologize. The revision of the message board system is ongoing, please bear with us. - Gauss

You could also try  site:community.roll20.net - Google Search  then add "(space)AND(space)(s/n)" or "+(s/n)" May want to bookmark it until the search is fully functional.