Basics28Double-tappingDouble-tap the device to move to the top of a list of contacts or emails.RotatingWhile the screen is locked, tap and hold the screen, and then rotate the device to landscapeorientation to launch the camera. To use this motion, on the Home screen, tap Apps →Settings → Lock screen → Lock screen options, and then drag the Camera quick accessswitch to the right.

Samsung GT-I8190L User Manual