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