zulip/templates/zerver/help/require-topics.md

Require topics in stream messages

Administrators can configure whether stream messages must have a specified topic.

Require topics in stream messages

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{start_tabs}

{settings_tab|organization-settings}

1. Under Other settings, toggle Require topics in streams messages.

{!save-changes.md!}

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Stream messages without a topic

If a user sends a message without a topic, the message's topic is displayed as (no topic).

When message editing is enabled, any user can add a topic to messages without a topic. They can do so regardless of whether they can edit topics in general.