The multi-function key of Cheetah CS10 car is the Fn key.

Function keys, the Esc key and the F1~F12 keys at the top of the keyboard are collectively called function keys. The Esc key is used to force abort or exit. The F1~F12 keys are defined with different functions when running different software.

Keyboard function keys in Windows

F1 If you are in a selected program and need help, press F1. If you are currently on the desktop, pressing F1 will bring up the Windows Help program. If you are working on a program and want to open Windows Help, you need to press Win F1. Press Shift F1 and the "What's This?" help message will appear.

F2 If a file or folder is selected in the explorer, pressing F2 will rename the selected file or folder.