    #######################################################################
    #  MACRO FILE NAME: exN03Tree1.mac                                    #
    #                                                                     #
    #  AUTHOR(S): Satoshi Tanaka                                          #
    #                                                                     #
    #  DATE:                                                              #
    #        Sept     08-09, 2001 (at Hebden Bridge, UK)                  #
    #        June     20, 2001                                            #
    #                                                                     #
    #  CONTENTS: A macro to demonstrate GAG DTREE                         #
    #                                                                     #
    #  USAGE:                                                             #
    #          * Edit exampleN03.cc to use the GAG interface              #
    #          % $G4BINDIR/exampleN03                                     #
    #          Idle> /control/execute visTutor/exN03Tree1.mac             #
    #                                                                     #
    #  REQUIRED PLATFORMS & SOFTWARES: Unix/Windows, GAG (Java version)   #
    #                                                                     #
    #  ENVIRONMENTAL VARIABLES (C-MACROS) FOR INSTALLATION:               #
    #                                                                     #
    #    * Unnecessary                                                    #
    #                                                                     #
    #  ENVIRONMENTAL VARIABLES (C-MACROS) FOR COMPILATION:                #
    #  (See geant4/source/visualization/README for details.)              #
    #                                                                     #
    #    * Unnecessary                                                    #
    #                                                                     #
    #  VERBOSE LEVEL:                                                     #
    #                                                                     #
    #    <  10: - does not print daughters of repeated logical volumes.   #
    #           - does not repeat replicas.                               #
    #    >= 10: prints all physical volumes.                              #
    #    For level of detail add:                                         #
    #    >=  0: prints physical volume name.                              #
    #    >=  1: prints logical volume name.                               #
    #    >=  2: prints solid name and type.                               #
    #                                                                     #
    #  ADDITIONAL NOTES:                                                  #
    #    * The geometry tree is displayed in GAG windows stdout.          #
    #      (If you are using the G4 character terminals, the tree is      #
    #       displayed in stdout.)                                         #
    #    * The compound command to visualize geometry tree:               #
    #      /vis/drawTree [] []              #
    #######################################################################

    # Draw the whole geometry tree
    #  Note: "!" means the default argument, i.e., "world"
    /vis/drawTree ! GAGTree

    # Draw a part of tree
    /vis/drawTree Gap GAGTree

    # Change the level to display details
    /vis/GAGTree/verbose 1
    /vis/drawTree ! GAGTree

    # Change the level to display details
    /vis/GAGTree/verbose 2
    /vis/drawTree ! GAGTree

    # Change the level to display details
    /vis/GAGTree/verbose 10
    /vis/drawTree ! GAGTree