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MS838B
User’s Manual
Appendix D – Adding Ctrl, Shift,
Alt and GUI Function Key
During setup, press the button and release accordingly.
If you keep pressing the button without release, it will cause data upload
failure, unexpected computer lock screen and other hotkey issues.
L-Ctrl Press
L-Shift Press
L-Alt Press
L-GUI Press
R-Ctrl Press
R-Shift Press
R-Alt Press
R-GUI Press
R-GUI Release
L-Ctrl Release
L-Shift Release
L-Alt Release
L-GUI Release
R-Ctrl Release
R-Shift Release
R-Alt Release
