Reference Balloon [How to set different Item Numbers]

Hello,

One can change drawing properties option "reference_bom_balloon_text" which allows user to have different text for reference Balloon. Along with this, I would like to update item number inside this which seems impossible as rpt.index cannot be overwritten.

So, I would like to understand how one can change symbol being called when user clicks on Create Ref Balloons into drawing file.

Thanks in advance...

Regards

Ketan