On my user name, underneath, it says casting on…where do I go to remove this???
You can’t, it changes as you make more posts to these forums. ‘Casting On’ means you are new to this community.
Welcome!! 
It’s just a way to denote your posting status and it’s kind of fun to watch it change with the number of posts you make.
Why would you want to? :?? We just thought it was a fun way to show how long you’ve been posting in KH rather than numbers of posts. They are references to parts of a sock.