/sys$common/syshlp/helplib.hlb SET, ENTRY, Qualifiers, /PRIORITY  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /PRIORITY=n

    Requires OPER (operator) or ALTPRI (alter priority) privilege
    to raise the priority above the value of the queue's maximum
    scheduling priority.

    Specifies the job-scheduling priority of the job. The value of
    n is an integer in the range of 0 to 255, where 0 is the lowest
    priority and 255 is the highest.

    The default value for the /PRIORITY qualifier is the value of
    the system parameter DEFQUEPRI. No privilege is needed to set the
    priority lower than the queue's maximum scheduling priority.