Direct messages and groups
Message one person, a small group, or yourself; close a conversation; turn a group into a channel.
Message one person
Click + next to Direct messages and pick the person, or click anyone's name or picture and choose Message. Only the two of you see the conversation.
The dot on a picture shows if they are online (green), away (yellow), do not disturb (red) or offline. See Status and out of office.
A group
Pick several people to start a group of up to 15. The same people again opens the same group. For more people, or a group with a name, make a private channel instead. See Channels.
Notes to yourself
Pick your own name to get a conversation only you see - handy for drafts and links.
Close a conversation
Choose Close on a direct message to take it off your list. It comes back by itself when a new message arrives. Nothing is deleted.
Calls
Click the phone or camera at the top of a direct message or group to call. See Calls and screen sharing.