INSPECT_3D /DIRECTORY

        [DISPLAY\]INSPECT_3D  Argument [FirstPlane [LastPlane]] /DIRECTORY Name-
    Tree

      Display the graphics under the user specified  <NameTree  "graphic  tree",
    instead  of  the usual <GREG tree. The tree is created if needed, cleared if
    it already exists.

    Using different "graphic trees" allows the user  to  simultaneously  display
    (the same or different) data in different ways, as each tree inherits a spe-
    cific window.

    A  few names should not be used as NameTree:  VSIDE, POPUP, CCT because they
    are already used by some specific plotting routine.