Type @_ followed by a few letters from a name or email address.
Pick the appropriate user or user group from the autocomplete.
Mention all topic participants
Using the @**topic** mention, you can mention everyone who has previously
participated in the topic by sending a message or
reacting with an emoji. This lets you notify just those
who have already engaged in the conversation.
Users can disable notifications for @**topic** mentions by:
You can mention everyone on a channel with the @**all** mention (or,
equivalently, @**everyone** or @**channel**). It's best to use these mentions
only when your message requires timely attention from many channel subscribers.
An organization can be configured to
restrict wildcard mentions in large channels.
Users can disable notifications for @**all**, @**everyone**, and
@**channel** mentions by:
Users: @**Bo Lin** or @**Ariella Drake|26** (two `*`)
User group: @*support team* (one `*`)
Silent mention: @_**Bo Lin** or @_**Ariella Drake|26** (`@_` instead of `@`)
Wildcard mentions: @**all**, @**everyone**, @**channel**, @**topic** (two `*`)
A | followed by a user ID is inserted automatically when you select a
user from the typeahead suggestions, if there are two users with the same
name in the organization.