You can change the input style of this pad.
There are several functions of input that can be changed. For example, you might change it to a Directional Pad that same as the traditional game controller. However, instead of pressing the bottom, you need just need to touch it, and you can set the Haptics intensity and the Deadzone of the touch pad on the right of the setting list.
Also, anytime you can set a click action on the left bot of the setting list. Then it will change to the menu that last picture shows; you can link any keyboard, mouse, game controller key on the click action. Same as the click action, you can change the function key of the up, left, right, and down pad. It's best to leave the default setting on the four keys unless you really need use additional keys to do something.