Format Code Mysteries

[JohnVisioMVP]

I have been exploring Format Codes trying to make a comprehensive document on the various Format Codes Visio uses. Some of them are not straight forward, so I am also creating a Visio sample shape illustrating the various codes.
I have come across a "feet-inch" code, but no reference to a list that includes that code. Does anyone know?
https://johnvisiomvp.ca/2021/09/26/visio-format-code-mysteries/

John...