Send messages, mentions, and files

For everyone. Mentions, attachments, embeds, reactions, and edits.

Last updated About 1 hour ago

For everyone.

Type in the box at the bottom of a channel or conversation and press Enter to send. Shift+Enter starts a new line.

Message composer with Attach file, Add emoji, and Mention someone outlined as a group
  • Attach file — plus button. Files can be up to 2 MB.
  • Add emoji — inserts into the message.
  • Mention someone — opens the mention menu. You can also type @.

Mentions

Type @ to mention a person. The same menu also lists tasks, projects, SOPs, and folders — those become links in the message.

Mention menu open above the composer listing people and a task

The outlined menu is the mention list. Click a row or press Enter to insert it.

A mention notifies that person in the app only. It does not send email. Thread replies are different — those can email. See Threads.

Files

Click Attach file, pick a file under 2 MB, then send. Images show a preview in the composer before you send.

Composer with a pending harbor-rooftop.jpg photo of rooftop HVAC units

After you send, the file sits in the message.

Sent message with a real Harbor rooftop HVAC photo

Paste a YouTube, Loom, or Vimeo link and it embeds in the message. Use Hide embed or Show embed on that message if you want the player out of the way.

Message with a YouTube link to a commercial HVAC crane install and the video embed outlined

Edit, delete, and react

Hover a message to see its toolbar.

You can Edit your own messages. Edited messages show (edited).

Hover toolbar on your own message with Edit outlined

Edit — pencil. Only on messages you wrote.

Admins can Delete other people’s messages they can see. They cannot edit them. Anyone can delete their own.

Hover toolbar on someone else's message with Delete outlined

Delete — trash. Confirm to remove the message. This cannot be undone.

Use Add reaction on the toolbar, or click an existing reaction to add yours.

Message from Jordan Wells with a thumbs-up reaction outlined