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