Click the plus () button next to the direct messages heading in the left sidebar, or the New direct message button at the bottom of the app.

Start typing the name of the person or group you want to message, and select their name from the list of suggestions. You can continue adding as many message recipients as you like.

Click on the compose box, or press Tab to compose your message. You can preview your message before sending.

Click the Send () button, or use a keyboard shortcut to send your message.

Tap the Direct messages () tab at the bottom of the app.

Tap the New DM button.

Start typing the name of the person you want to message, and select their name from the list of suggestions. You can continue adding as many message recipients as you like.

Approve by tapping the Compose button in the top right corner of the app.

Compose your message, and tap the Send () button in the bottom right corner of the app.