# Send messages, mentions and files

> Direct messages, @mentions, attachments and notifications.

Canonical page: https://aozo.in/docs/hubble/messages-and-mentions
Last updated: 2026-11-12
Product: Hubble
Section: Guides

![The Hubble mobile Direct Messages screen listing conversations with names, the latest message, the time and unread counts](https://aozo.in/images/docs/hubble-dm.webp)

1. **Open Direct messages** Choose Direct to see your one-to-one and group chats, with unread counts.
2. **Start a chat** Pick a teammate, or search for one, and write your message.
3. **Mention someone** Type @ and a name to mention a teammate. They get a notification.
4. **Attach a file** Add a file in the conversation instead of sending it by email.

- You can see when someone is typing.
- Unread counts show which chats need you.
- New messages arrive without a refresh.