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

 element-expression

    Specifies one or more elements whose generations are to be
    modified. An element expression can be an element name, a group
    name, a wildcard expression, or a list of these separated by
    commas.

 remark

    Specifies a character string to be logged in the history file with
    this command, usually used to explain why the command was entered.
    The remark is enclosed in quotation marks. If no remark was
    entered, a null remark ("") is logged. Note that this parameter
    and the string on the /REMARK qualifier are unrelated.