The Chromebook touchpad is slightly different from the traditional laptops. The touchpad can be used to move the Chromebook arrow pointer and to select items on the screen.
Please see the following pictures that demonstrate the Chromebook touchpad, finger placement and finger movements that will allow you use the touchpad in order to click, right-click, scroll up and down, and drag and drop.
If your touchpad stops working, try the following steps:
You can tap your touchpad to click, or change the direction you scroll. Here's how: