Subject This field is automatically populated with the ID of the subject when you load a subject file.

Session This drop down menu is automatically populated with all of the sessions available for the current subject.

Configuration This drop down menu is automatically populated with all of the configurations available for the current session.

Trial This drop down menu is automatically populated with all of the trials available for the current configuration.

Object This list is automatically populated with all of the objects in the current trial. Each object is enabled if it has at least one point of interest (POI) that can be digitized in the X-ray images.