The Info Cavallo window is only shown for UK and Irish Horse Racing markets. When the window is rolled up the header displays the number of different bits of information the window contains.
Info Cavallo window dockedWhen expanded the window displays various bits of information about the selection that your mouse is currently over such as the Nome Fantino and Nome Allenatore. By right clicking on the header it brings up the various options for this window.
Info Cavallo window floating with Opzioni clic tasto destro
Info Cavallo window undocked with horizontal and vertical grid lines displayed