If you have been learning to hover in normal mode, you should now switch to using idle-up mode for practicing forwards and backwards flight.

The idle-up mode will allow you to keep a constant headspeed regardless of the throttle stick position, which will make the helicopter more responsive to the throttle stick. This is necessary to perform proper banked turns during fast forward and backward flight.

Be sure to reread the Helicopter power-on procedure section to learn the proper procedure for switching into idle-up mode.