Create a data flow diagram in Visio - supportce Create a data flow diagram in Visio. From the Data Flow Diagram Shapes stencil, drag an External interactor shape onto the drawing page to represent each external source or destination for data. Drag more shapes onto the page to represent the processes, states, or entities involved in the data flow you are documenting. How to find logic gates shapes in Visio 2010? - Microsoft Oct 08, 2014In Visio Pro they are at. More Shapes -> Engineering -> Electrical Engineering -> Analog and Digital Logic. If you have Visio Standard there are 3rd-party shapes available.