/sys$common/syshlp/helplib.hlb CMS, MODIFY, RESERVATION, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    CMS> MODIFY RESERVATION/GENERATION=5/REMARK="Add new feature"
    _Element expression: SPEC.TXT
    _Remark: Modify the reservation remark
    %CMS-S-MODIFIED, reservation SPEC.TXT modified

      This command specifies a new remark to be substituted for the
      reservation remark that was specified when generation 5 of
      element SPEC.TXT was reserved. You must also specify the element
      expression, and its associated remark, which is logged in the
      history file.