Main screen lock also locks out CH1 to CH4

There is that green lock icon at the bottom right corner. Engages "locked" mode. What I would personally expect - whole transmitter is locked, I can hang it on a lanyard on my neck, and no matter how much throttle or steering I push, no output is sent. What I observe - I cannot enter a menu, or do a fine adjustment. Honestly, I never had menu activate by mistake, but more than once I hit throttle or catch steering on something while climbing on and off obstacles with a crawler. I would also consider not to block other channels. I have sound and light on them, and having a "demo" mode could be good. It is "to taste" modification, but since most of the things I do here are for myself, or done on request with zero gratitude or feedback, I do what I want. EDIT: OK, had a glance at my cars, realized what I want. Lock out CH1 Steering, CH2 Throttle, CH3 Winch and CH4 4WS. Keep CH5+ for "fun" functions only (lights, sounds). Keep mix source functional for "demo" mode, even if source of mix is locked channel. Disable mix target, even if value is coming from not locked channel.