The touchpad works just like on a laptop. To move the pointer, move your finger inside the U-shaped area. To click, tap the touchpad. Under the U-shaped area are right and left buttons, separated by a line. Resting a finger on the buttons results in a constant click state. With constant click state you can, for example, drag items or select text.
To scroll, slide 2 fingers up or down the touchpad. The left and right edges of the touchpad work just like your tablet. Swipe in from the left edge to switch between apps, or swipe in from the right edge to open the menus (Search, Share, Start, Devices, and Settings).