In the rich text editor:
@Maelection
In a comment:
[Maelection](https://chowlings.com/user/Maelection)
For Names and Avatars:
In the rich text editor:
%Maelection
In a comment:
[![Maelection's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Maelection) [Maelection](https://chowlings.com/user/Maelection)