The Priority field allows you to specify the priority
  of the print job. The value can be from 1 to 255,
  where 1 is the lowest priority and 255 is the highest
  priority.

  To use the Priority field:

  1. Move the pointer to the Priority entry field.

  2. Click MB1. Enter a number in the field.

  3. Click on the OK button.

  If no priority is specified, the default priority for
  that queue will be used.