beeger, go to setup, arena settings, flightmodeflags, then change. you'll see the option there for lead computing sight and dive bomb sight. dive bomb sight works when bombs are selected: a continuously calculated impact point green cross is drawn on the ground. the lead gunsight is also a cross in front of your target plane, which you select the same way you select a target plane for padlock mode (be sure to enable friendly targeting if using this offline against friendly drones).
Oh yeah, you have to be offline to do this, or in the TA.