[potatopolis]

Bottom left; click the little person icon. A modal pops up asking you to enter the user ID of the person you wish to chat with.

There are valid complaints to be made about Riot's UI, but I really don't think that's one of them.

[sandov]

We did that many times, but nothing appeared on each other's screen, it seemed as if the IDs were being sent to /dev/null.