Keychron K1 - Operating System and Input Method Configuration; OS Switch; Input Method Switch

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When backlit is on, press button to switch among them. Short press fn and “left
arrow” or fn and “right arrow” to adjust light colours. (For RGB version only)
OS Switch
Mac / iOS
Turn on the switch to Mac/iOS when you are connected to a Mac or iOS operating
system.
Windows / Android
Switch to toggle to Windows / Android when the keyboard is connected to a Windows or
Android operating system.
*When using the Windows / Android mode, keys are used for “Windows” and
“Alt” functions.
Input Method Switch
For iOS:
Input method switch: Ctrl + Space
Caps Lock: Caps (Enable General > Keyboard > Hardware Keyboard > Caps Lock
Language Switch)
For Android:
Input method switch: Shift or Shift + Space