3dr iris radio mixer

Hi,

can anyone guide me how to delete sub menu inside the mixer menu.
it become like this

MIXER 24/32 5/10
CH1 RUD 100
:= RUD 100
+= RUD 100
CH2 THR 100
CH3 ELE 100
CH4 AIL 100

and also how to change mode 2 radio to mode 1. TQ

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