Keys 5 + 1 with numlock activated -> New function on FS2004 ?

Hello all,I download a panel for FFX-SGA Boeing 737-800 and the readme says that I can press the keys 5 + 1 with numlock activated to get a nice left wingview and 5 + 3 with numlock activated to get a nice right wingview.Ok, I pressed the keys and it really works.The question is: This key combination is mapped by default in FS2004 ? Or it is somehow coded in this model of FFX/SGA?I'am trying to understand how this can put my eyes over the wings, once there is anything explicit on the panel.cfg file.Any help appreciated.