Pls mention where you would like to change to be reflected; in the model or in the drawing. If you r trying to change the dimension in the model (for the purpose of writing relations with simpler text, for example) then you can first highlight the dimension by modify and then select dim cosmetics and then symbol. Just type in the symbol u like.
If u want this info to be shown on a drawing then it is a different procedure.
I only want the change to be seen on the drawing, not reflected in the model because I am using one drawing to represent different size. So the letter A sends to a dimensions list with the different models available.
Also, there seems to be different signs like @O, @D, etc. Is there a list or an explanation available for these signs.
In the model window go to modify/DimCosmetics/Symbol select the dimension. Then enter A or whatever you want it to show up as. Then in the drawing show the dimension, and modify the text from @D to @S. The S is for symbol! You will also see the symbol on the second line of your family tables. The only thing is each symbol has to be different (there can't be 2 A's)!