| Face outline | Outline the face |
| Yellow circle | Indicates the center of the face outline, that is, the center of the face |
| Pink line | Midline of the nose |
| Red circle | Average center of both eyes |
| Green circle | Average center of both pupils (iris) |
| Based on the red circle, the green circle moves according to the position of the pupil. |
| White square | Central criterion by the average value of both eye outlines |
| Pink circle | The current position of the face perpendicular to the screen |
| Cyan circle | Gaze tracking up, down, left and right according to the angle of the face based on the pink circle |