When set to 0, the image on the computer's monitor is sent directly to printer. All the other PCL options are ignored.
When set to 1, the PCL code is sent straight to the printer. The other PCL options are executed. Also, the vertical motion index, top margin, and vertical cursor position are set to special values. This was written for a specific customer and should not be used by others.
When set to a number greater than 1, the PCL code is sent straight to the printer. The other PCL options are executed.