I would like to edit the calloutformat.txt file so holes like in IMAGE 1 (below) have text describing the hole type versus symbols.   I am trying to make sense of the calloutfomat.txt file.  In our default folder, we have a calloutformat.txt and a calloutformat2.txt.  I started playing around with each of them to see what the differences are.   As you can see in IMAGE 2 (below), its the same hole, different callout format.   What I am trying to find is what controls the variable ?   On calloutformat.txt,  that variable displays "THRU ALL".   On calloutformat2.txt, doesnt exist but the txt THRU does.

Does anyone have a tutorial or guide on how to customize the calloutformat.txt ?

IMAGE 1

IMAGE 2