No need to appologize for speaking a second language when so many English speakers don't speak any other language.
Nothing wrong with your suggestion but many beginners don't know how to add extra features to the HUD or to read logs. I am only requesting that the extra channels be added to the Radio Calibration page.
The pitch issue really screwed me up when I first got started. But it is logical. With a multicopter when you want to move forward the the motors in the forward direction must slow down, the PWM values must be reduced. So it is logical that the green bar must go down when the stick goes forward.
BUT it really screws up beginners because they expect the green sliders to go in the same direction as the sticks are moving and all of them do that except the pitch. I think it is really difficult for developers to think like beginners with so much experience and time into the system. I think it is often surprising to them that beginners see things in a different way. It is natural and a difficultly. Like refering to ports with three different non-unique labeling. This is a big problem for beginners. The same output port on a Pixhawk and APM are refered to pin numbers 50, AUX1, A9 , RC9. To make it worse RC9 is also the transmitter channel 9. This inconsistent labeling causes a LOT of grief to beginners. Also having the motor numbers criss-cross the frame rather than ALWAYS numbers go clockwise from the same starting point.