Description: The printer will act as if media of the chosen dimension (in the feed direction) is present in this input source. Note that this value will be used even if the input tray is empty. Feed dimension measurements are taken relative to the feed direction associated with that sub-unit and are in input sub-unit dimensional units (MediaUnit). If the printer supports the declared dimension, the granted dimension is the same as the declared dimension. If not, the granted dimension is set to the closest dimension that the printer supports when the declared dimension is set. The value (-1) means other and specifically indicates that this sub-unit places no restriction on this parameter. The value (-2) indicates unknown. Refer to ftp://ftp.pwg.org/pub/pwg/pmp/drafts/pmib_031698.txt, for more details in the Standard Printer MIB. Additional information: The objects for trays 2, 3, and 6 reflect the configuration of the corresponding trays. When the tray is removed, a value of -2 is returned. The default values assume the trays are configured for letter size paper (or COM10, in the case of the envelope feeder). For tray 1 and the envelope feeder, the object returns the value of the media size for which the tray is currently configured because those trays cannot sense what size media they contain.