/me action messages
You can send messages that display your profile picture and name as the
beginning of the message content by beginning a message with /me. You can
use this feature in conversations when you want to describe actions you’ve
taken or things that are happening around you using a third-person voice.
Examples
Section titled “Examples”For example, if you are Ada Starr:
What you type
Section titled “What you type”/me is awayWhat it looks like
Section titled “What it looks like”