The bar graph is a variation of the graph tool that allows you to display values as different height bars. The bar graph shows values at a given time, either the simulation time, or the scrub time, as set in the Run Toolbar. As you simulate a model, the bar graph will update.
Select the graph from the Interface Build toolbar, and click on the page at the location you want it to appear (you can also add a page to an existing graph you've already put down). On the graph panel, select type bar at the top.
Then select the variables you want to appear in the bar graph. You can include any variables you want. For more information on adding variables, see Graph Series Property Panel.
The options and styles for the bar graph are the same as those for other graphs (seeGraph Styles Tab for more discussion).
The colors for the bars will follow the color sequence set for the model (see Graph Styles Properties Panel), but you can specify the color used for each variable directly.