Asus M530w user manual Button, press Start More Settings More Key Assignment . From

Chapter 1

No.	Item	Description
19	Speaker	Allows you to listen audio media and phone calls.
20	Battery compartment	Contains the battery that supplies power to the device.
21	Camera button /	By default, this button is used to activate the Camera application:
	Function Side key	Press to launch the camera viewfinder.
		Press to take a picture if already in camera mode.
		To change the key assignment and activate other applications using this
		button, press Start > More > Settings > More > Key Assignment. From the
		dropdown list, select the application you want to activate using this button.