Format codes : superscript and subscript

I need to be able to express, on the dimension line, instead of the actual dimension, a variable.

All the variables have subscripts. It took me several days of searching to finally discover that, in principle, the AutoCAD formatting codes work in the text box. You can find them here:

http://docs.autodesk.com/ACD/2014/ENU/index.html?url=files/GUID-7D8BB40F-5C4E-4AE5-BD75-9ED7112E5967.htm,topicNumber=d30e89787

I attempted to write a subscript this way:

\\A1;d\\H2;\\S^1;

This gives me a d with a subscript 1. Unfortunately, the kerning is poor, and the result has too much space between the d and the 1.

Questions:

1. Are there other codes for DraftSight?

2. Is there another approach for subscripts?

3. Does anyone know how to change the kerning? The \\Tvalue; did not give me the required result.