The upper part of the window has three boxes with important information about the current event:

• E_cms: The collision energy (in GeV) for the current event.
• Number of Tracks: The number of detected particles in the current event.
• Energy: Detected/measured energy (in GeV) for the current event. If the energy of all particles in the event is measured correctly, then should the measured energy be equal to the collision energy (the incoming energy).