EDIT

        [SIC\]EDIT [File_Name]

    Without argument, EDIT dumps the Stack  on  a  file  named  STACK.DEFEXT
    where  DEFEXT is the default macro extension specified by the program or
    by the user using command SIC\SIC EXTENSION, and then calls a text  edi-
    tor  to  edit  this file. If a file name is given, the specified file is
    edited.

    The editor to be chosen is defined by the logical name  GAG_EDIT,  which
    you  can define in your $HOME/.gag.dico file. Command SIC EDIT NewEditor
    can also be used to re-define the choice of the editor.