Xerox 6030 User Manual page 239

Setting Up [Priority]
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The [Priority] parameter in Print Services on Web is the same as the [Print
service] parameter on the printer control panel.
Select [Priority] from the [System parameters] menu.
The [Priority] selections will display in the right pane.
Select the queuing standard from [QIN_FOPEN] or [QIN_FCLOSE].
Press the [Apply] button to save the new setting, [Cancel] to revert to the
existing setting, or [Reset to default] to return to the factory default setting.