Somehow the backlight effect increased the speed of my keyboard. I don't know how to slow down the speed effect again. Can you help me, please?

Please try holding fn + /- to adjust the light effect speed.

 

*If your keyboard belongs to the QMK keyboards, please hold the following key combinations to adjust the light effect speed:

1/ Press fn/fn1 + T (RGB speed increase)

2/ Press fn/fn1+ G (RGB speed decrease)