To make AUTOGRAPH/SGS/GKS ready for plotting, use the Fortran statement
The routine asks for the SGS/GKS workstation name via the standard input device used by NCAR (normally the terminal). If <CR> or an invalid name is entered, a list of all the current names is displayed and the request is repeated. Once SGS/GKS and the workstation have all been successfully opened, AUTOGRAPH is configured to use the full display surface (in other words the base SGS zone). If you don’t want the AUTOGRAPH plot to fill the display surface, use the SGS zone creation routines to select the desired region and then call SNX_AGWV (see §9).