title c=black f=swiss h=3 'Conducting a Market Survey'; title2 c=black f=swiss h=2 'Summarized Schedule'; proc gantt data=sumsched graphics holidata=holidata; id phase; chart / nojobnum nolegend ...

This example takes advantage of the Output Delivery System (ODS) HTML statement to create a very simple "drill-down" Gantt application beginning from a summary Gantt chart of the "top level" projects ...