What functions can be performed via the touchpad of a laptop?

Ps. I've found out now that I can scroll up and down while simultaneously applying medium and index finger.

Hard to say because not every laptop can be operated the same.

Some have a scroll strip on the right edge, if you move your finger over it you can also scroll and in my opinion is much more comfortable.

And the Apple devices have perfected the touchpad operation.

That depends on the touchpad. Usually, there's something in the manual or you can find out in the settings.

Arrives on the laptop and the pad.
Often you can also make gestures with up to 5 fingers.
So something like 3 fingers down to minimize wipe.
Theoretically, everything is possible on the smartphone too:-)

Krass, and if I move your index and middle finger apart, you can change the screen size or font size.

Do you see? And all of that can't be mine.

Mine has a strip on the right edge to scroll. I can resize when I scroll while holding down Ctrl.