Library /sys$common/syshlp/dbg$help.hlb DEBUG, SHOW, IMAGE, Parameters  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 image-name

    Specifies the name of an image to be included in the display. If
    you do not specify a name, or if you specify the asterisk (*)
    wildcard character by itself, all images are listed. You can use
    the wildcard within an image name.