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A broadcast is one message posted to many Slack channels. Writing one means giving it an internal name, a customer-facing notification title, the content itself, and a sender. Click New broadcast from the Broadcasts page. It stays a draft, editable and unsent, until you send or schedule it from the review step.

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Name

The internal name, used in the Broadcasts list and in your team’s search. It never leaves Plain, so name it for your team: “Q3 pricing update. Enterprise” is more useful than “Hello”.

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Notification title

What recipients see in their Slack notification banner, before they open the message. This is customer-facing. By default the notification title copies whatever you type as the name. As soon as you edit the notification title yourself, it stops following the name and stays as you wrote it. A notification title is required before you can send.

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Content

The composer is a formatted text editor that becomes a Slack message when it sends. Press / anywhere to insert a block. Available blocks:
  • Text, headings, bullet lists, numbered lists, quotes, and code
  • Dividers
  • Images
  • Buttons: a labeled link, rendered as a real Slack button
  • @here and @channel mentions
Select text to show the formatting toolbar.

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Sender

Under Send from, choose who the message appears to come from:
  • Your workspace: posts under your workspace’s name and avatar. This is the default.
  • A user: posts under their name and avatar. Only users with the Owner, Admin, or Support role can be picked.
The message still goes out on Plain’s Slack app either way; the sender controls the name and avatar shown.

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Options

Unfurl Slack links and media controls whether Slack expands link previews and embedded media in your message. It’s on by default, matching Slack’s own behavior. Turn it off for a message with several links that would otherwise become a wall of previews.

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