Camera change with one button

Hi
Designer here looking for some help.
Just wondering how I can change Camera ID with only one button.
I check this tutorial (https://developer.playcanvas.com/en/tutorials/more-cameras/)
and would like to know how I could assign a button to the camera change function. The code here uses the Keyboard. But I would like to assemble everything on one button instead of the keyboard input.

    if (app.keyboard.wasPressed(pc.KEY_SPACE) ) {
        this.setCamera('Center');


Here is my Camera ID as an array.

var camera = [];
  camera[0] = "Camera_01";
  camera[1] = "Camera_02";
  camera[2] = "Camera_03";

Also is it possible to have my button outside the Playcanvas window?

There are a few tutorials about creating a UI here: https://developer.playcanvas.com/en/tutorials/?tags=ui

There should be one that shows how to attach a callback to a button press so you can call setCamera.