Messaging works really well! @screenname on a post will alert the person to your posted comment.
Clicking on anyone’s avatar will bring up their profile and a MESSAGE button. Click on that and you’re on a private message.
For more instructions, click on 
just below the banner and then choose which slide guide video you want to watch.
And if there’s still something that baffles you, ModSupport’s avatar 
and then on message. We’ll hear your cry for help!
Seenie from ModSupport