Uday,
I doubt that a similar mechanism as the command nodes in SF exists for Adobe forms. The printer commands are generated by the ADS server, with the help of the XDC files.
You could try to create a modified Zebra XDC file, starting with the Adobe-supplied standard ZPL XDC file, e.g. zpl203.xdc
The XDC file for Zebra contains a sequence named "startPage" which in effect should be the ZPL commands executed at the start of every page (= label). It contains the ZPL command
^XA^LL<pageheight>
You could add other ZPL commands here which should be sent to the label printer at the start of every label. Or you could extend the "endPage" sequence, which is defined as
^XZ
adding some commands before the ^XZ cmd (which concludes a label)
Regards,
Alex