Online in the one of the main arena's you will not have an arena settings tab.
Offline you might, if you create your own H2H host for practise for sure it will be there as long as YOU are the host. Ie you have all the controls there like Hitech has for the main.
Easiest way to get that lead computing gunsight is to come into the Training Arena. Hit control Tab to enable, then point plane at someone, and hit tab again. Should see a green box pop up around his icon, and the XX's showing you where to aim.
