The autoformat feature in the results program is fairly effective at ensuring that the graphs drawn are logical: by default, line graphs are drawn for instantaneous results and column graphs for aggregate results. Most commonly, any refinement is done after you have drawn the graph, by right-clicking on the graph and then selecting from one of the formatting options available. However, you can also specify how you want the graph to be presented before you draw it, using the options in the Format tab in the Draw dialog.