This manual describes how to use IdeaPad Y470/ Y570. It includes the front view, left view, right view, front view, bottom view, the first use, the use of AC power adapter and battery, the use of touch pad, the use of keyboard, the use of external devices, special keys and buttons, system status lights, the protection of your computer, the activation of NVIDIA® OptimusTM, the use of NVIDIA® 3D VisionTM technology, the use of Internet, the one-key rescue system, the common problems, the troubleshooting and other contents.