How to create custom symbols to add to drawings

Hi ​, I would like to quick add the suffix "TYP", "MIN", "MAX" to my dimension. In order to achieve that I modified the gtol.sym file as follows:

;;

;; ---------------------------------------------------------------------------

;;

;; Custom GudelUK symbols

;;

#Cust-GUK,Custom GUK Symbols

*TYP,Typical

A,TEXT 0,0,

*MAX,Maximum

A,TEXT 0,0,

*MIN, Minimum

A,TEXT 0,0,

I can see the new "library" on the list but the three new symbols are empty. What am I doing wrong?

If I manage to put it right, is it possible to add the symbol to the bottom of "Dimension Text" window, next to the "More" button?

SolidworksDrawings And Detailing