The main window consists of a menu bar, a tool bar, the main display area with scroll bars for horizontal and vertical motion, a zoom scale bar, and a representation push-button selection. The main display area has a rainbow scale on the right to indicate scalar values.
In the tool bar, the first two buttons from the left are for starting and stopping a simulation, respectively. The next set of four buttons are for size, setup, display, and parameter window. The last button to the right is for quiting the simulation program.
The lower-left set of push-buttons allows for the interactive change of representations to the: Flow, Intensity, Direction, Occupancy, and Density representations.