The second step to take is to select the "model" to use. Model is a "marker", attached to ones head, simplifying the head pose determination.

There are two predefined models "NP TrackClip" and "NP TrackClip Pro" - if you use one of those, just select it using the Model Name combobox.

If you use any other model, you'll have to create it first. Just press the Create New button and the form for new model creation will pop up.

Type in the name of your model to the Model Name box and then select the model type. Available model types are these:

Now fill in the model dimensions (where applicable) according to the diagram (all dimensions are in milimeters). Last thing to do is to select, if the model uses LEDs - if it does, check the Model with LEDs checkbox. After pressing the Create button, the new model should appear in the Model Name combobox for you to select it.