You have the option of using and programming the remote located on the side of the tablet.
This if helpful for creating shortcuts for certain functions like Zoom, Undo, and Redo. See Customizing Controls
You do not have to program or use the remote at all to use the tablet.
The tablet has three touch-pad buttons on the top right of the screen.
You can also access the tablet properties from System Preferences:
Choose the device that you want to change the properties for at the top of the window under 'Device'.
Use the dropdown menus for each key to choose the function.
Click 'Default' to return all of the values back to the default settings.