How to turn on the light quickly in PDA machine

You can turn on the light quickly by shortcut keys.

PDA stands for Personal Digital Assistant. Compared with traditional computers, personal digital assistants have the advantages of portability, compactness and strong mobility, while maintaining powerful functions. However, their disadvantages are that their screens are too small and their endurance is limited. Personal digital assistants usually use a stylus as an input device and a memory card as an external storage medium. In wireless transmission, most personal digital assistants have infrared and Bluetooth interfaces to ensure the convenience of wireless transmission. Many personal digital assistants can also have Wi-Fi connection and global positioning system.