You can use JES2 commands to specify printer characteristics, override a system request for a setup you are unable to fulfill, and display the controls in effect for a printer. You can also specify, verify, and reset the work selection values for a printer.

The list of work selection values specifies those output characteristics that are considered during work selection. The output characteristics for a printer are defined during initialization or dynamically through the $ADD PRT(nnnn) command. All output characteristics can be modified through the $T PRT(nnnn) command. This command allows you to remove, add, and rearrange values to the list.

The UNIT= parameter of the $T PRT(nnnn) command allows you to reassign the unit address of a JES2 printer, a FSS-managed printer, or a non-channel attached printer. Before entering $T PRT,UNIT=, you must ensure that no address is specified on the UNIT= parameter of the initialization statement for this printer. Use the $D PRT command or the $D U, PRTS command to check the status of all output characteristics assigned at initialization. If no unit address has been assigned, enter the $T PRT,UNIT= command, followed by the $S PRT(nnnn) command.

While printing the output of a data set, FSS-managed printers pre-select the next data set for printing, making that data set unselectable for another printer that may have become free. Using the PRESELCT=NO parameter on the $T PRTnnnn command, you can prevent a printer from pre-selecting data sets, making them selectable for any printer.