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Messages

Send text and one file of up to 25 MB, react, mention, reply, edit or delete your own, and search the whole room.

Type in the box at the foot of a channel and press Enter to send. Point at a message to reply, react, save it or reply in a thread. The same bar pins and reports messages, and edits or deletes your own.

What's on it

Attach a file or image
The paperclip. One file per message, up to 25 MB. Images are resized to 1,600 pixels.
Reactions
Add an emoji under a message. Choose your own again to take it off.
@mentions
Type @ and a name to notify someone in a group room. @everyone notifies the whole room, for roles allowed to use it.
Reply
Quotes the message you are answering and notifies its writer.
Edit message
Change your own text. It shows "(edited)"; earlier versions are not kept.
Search
Finds people and messages anywhere in the room.

How to delete a message

  1. 1.

    Point at your message and choose Delete message.

  2. 2.

    Confirm. It is deleted for everyone and cannot be brought back.

A moderator can remove someone else's message. It then reads "Message removed by a moderator", its attachment goes too, and the original is kept in the moderation record.

Rules and limits

  • Links to YouTube, Vimeo, Wistia and Loom play in the message once you choose to load them.
  • Nobody can remove a message from someone ranked at or above them.
  • Your first message anywhere earns the Icebreaker achievement.
  • The Community Guidelines apply to every message.

If something goes wrong

"You are muted in this room and cannot send messages."
A moderator muted you. It lifts at the time they chose.
"Slow mode is on in this channel…"
Wait the seconds it says between messages.
"This room is archived…"
Nobody can post until the room is reopened.
"File is too large. The limit is 25.0 MB."
Choose a smaller file.
"The message did not send. Your attachment is still here…"
Send it again.
"Could not save that edit."
Your edit was not saved. Try again.

Checked against the app on 17 October 2026. If something here no longer matches what you see, say so below.

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