Mentions
Outline supports mentioning a number of different entities including users and groups in your workspace using the @ syntax.
Users and groups
To mention another user or group directly you can use the @ syntax which will bring up a list of team members, keep typing to filter the list. Mentioning a team member or group will cause them to receive a notification if they have access to the document.

Mentioning a user
Documents and collections
You can also embed small previews of documents and collections through the mention syntax. The title and icon will be automatically kept uptodate. Keep typing to see the option to “Create a new doc” through this menu, giving easy access to on-the-fly document creation.

Mentioning a document