In game messaging?

I was riding along tonight and an in game message popped up adjacent to rider name on the right side banner. We were riding together for a bit. I use a laptop, can this be done with the mobile app?

hit ‘m’ and type away on your laptop.

Or on the mobile app click the “group message” action button on the action page - or on the riders list page you can click the white quote on somebodies name and send a private message just to them.

Group messages are only heard by people you are riding with (within 100meters or so). Private messages direct to somebody work all the time.

On the desktop version, your only option currently is “group message” and that’s done with the ‘m’ key as Chuck pointed out below.