Yes..there's servo reversing options on most if not all TX.
On a cheap radio system...you'll get a manual servo throw movement adjstments.

On more expensive radio system, you'll also have dual rates. Meaning you have the options of switching between
high or low control defection rates.

On more expensive radio computerized systems ..you can even adjust the stick's sensitivites and a more features.

It depends what direction you mount the servos.

Anyway it's the control surface deflection...the air flow forcing down on the control surface.
That's why it's easier to fly a model at a faster speed and most newbies get into trouble thinking they can fly fast...
The controls become sluggish at a slower air speed. (less air flow on the control surface)


Viewing from behind the model.

Example...if you want a model to roll to the right...the right airleron should be pionting up.
The stick is in the RIGHT position

For the elevator...it's the same . For up..the elevator is pionting up...the air flow force the tail down..therefore pionting the
front of the model up.
The stick is in the pull (DOWN) position.

In the US..the airlerons and elevators are assigned to the right stick.

For the throttle...more power , the stick it in the UP position.


When the model is flying towards you....TURN THE AIRLERON STICK IN THE SAME DIRECTION THE WING IS DIPPING TO LEVEL THE MODEL.
This way you don't have to think...lol
It's the samething when backing up a semi trailer or any trailer...lol When you look in the mirror...turn the steering wheel in the direction the trailer is drifting to straighten the trailer.

When using only rudder to roll/bank the model....assign the rudder as if it's the airlerons. (3 channel configurations)