Hello there,
I would think there would be a way to enable it in the advance driver settings.I could not find the steps for that so you may need to call Support.
On one of our computers the "Top Tray" option is grayed out/unavailable for the output destination. On a different computer (same network) the option works fine (top tray & stacker options both work). I've tried reinstalling the driver (PCL) without success. Any suggestions?