[oXygen-user] Setting output file name

I'm generating PDFs using the default/demo PDF generator in Oxygen 10.x on Vista and using a bookmap and a dita map. I'm looking for a way to set the output file name explicitly -- currently the ditamap/bookmap I'm using becomes the output file name. I've looked through help and through the demo transforms, but I'm not finding this. I see that I can do this for PS, HTML, or TXT output. Is there a way to explicitly set the file name in Oxygen 10.x / DITA?