When making clothes how to get name to appear?

[Tarraz]

I want my name to appear on some things I'm making ''shirt crafted by xxxx''

but when I click 'Mark Item'' it just says 'Exceptional'.

 

[Ramen Noodles]

You don't click on mark. You leave it saying mark and it will mark your name.

 

[Theros Ironfeld]

You must be a Grandmaster (100.0) or above to mark items with your name.