When setting up to run a new experiment, the user sets the desired speed and duration of the run, and the time that graphics should start displaying.

The user next sets the desired visibility conditions to be simulated, and weather deicing is required.

Next, he must select which of four, previously defined runway use strategies should be used, and if gaps should be inserted for arrivals or departures.

The Interaction drop-down menu allows the user to choose from a number of interaction modes. Here, a departing flight is requesting pushback.

And here, a departing flight is requesting a particular departure runway entrance.

If the user clicks on a different runway entrance, the taxi route is changed in response.

While the experiment is running, the user may view a list of arriving or departing flights for a runway, to assist in making interaction decisions.

When preparing an experiment, the user may designate how each taxiway segment should be used, by just clicking on it.

The default fastest routes to any point can be shown by just clicking on the destination intersection.

The user may designate certain monitored nodes (white dots) at which the program should interrogate the user for further routing instructions.

Then when a flight arrives at such a node the user may just let it continue by pressing the right button

or try alternative routes, by pressing the left button.

The user is also free to interact with any flight at random to stop it, or to modify waypoints along its route.

Whenever a flight is clicked, the program shows the intended route continuation.

In this case, two new waypoints were entered by the user, causing the route to jog up, and then back down.