RCU Forums - Blade Mach 25

Hi All
Looking for some help in programming my Spektrum DX7 to control a Blade Mach 25 drone. The manual provided with the drone makes a quick reference to programming a DX7 but I can't find the features in my DX7 .
The manual states for a DX7:

Channel Assign [NEXT]
Gear = B
Aux = 1
Servo Setup : normal
Throttle cut : Switch H

Flight mode
B-switch 0 = Stability Low Bank Angle
B-switch 1 = Stability High Bank Angle
B-switch 2 = Agility
Bind 1 = Panic Recovery

I have the manual for my DX7 but there is no reference to B-switch (it can only be one switch as it has three position) no idea which is H switch and no idea why they have put NEXT after channel assign?

Has anyone programmed a DX7 for a Blade?