When printing to postscript or PDF how do you set white to print as white?

This question may be answered best in the Printing and Plotting Forum; moving it there from OpenCities Map.  If you don't get the answer you need please open a New Service Request and we can take a look at your files & settings to see what might be the issue.

Managed to work this one out thanks; Configuration Variable - MS_PLT_INVERT_WHITE_COLORS, set to 0

1. Open the PDF file in Acrobat, click "View" and open the "Tools" submenu.
2. Click "Pages." Click the "Background" item in the Pages pane.
3. Click "Add Background." Click the white swatch in the "From Color" control, and then click "OK" to insert the blank background.
4. Print the PDF.