I.e. how many labels left to print in the job? Made a test label using ^PQ30 in the internal ZT610 label editor.
Shouldn't it then report 30?
~HS doesn't seem to do it, neither does device.jobs.print.
^XA ^LL450 ^A0N,39,40^FO85,52^FD43775^FS (blah blah rest of the label, just text fields like the one above)
^PQ30 ^XZ