In the rich text editor:
@FakeJunker
In a comment:
[FakeJunker](https://chowlings.com/user/FakeJunker)
For Names and Avatars:
In the rich text editor:
%FakeJunker
In a comment:
[](https://chowlings.com/user/FakeJunker) [FakeJunker](https://chowlings.com/user/FakeJunker)