# Backlighting <!-- FIXME: Describe how backlighting works in QMK --> ## Backlight Keycodes These keycodes control the backlight. Most keyboards use this for single color in-switch lighting. |Key |Description | |---------|------------------------------------------| |`BL_TOGG`|Turn the backlight on or off | |`BL_STEP`|Cycle through backlight levels | |`BL_x` |Set a specific backlight level between 0-9| |`BL_ON` |An alias for `BL_9` | |`BL_OFF` |An alias for `BL_0` | |`BL_INC` |Increase backlight level | |`BL_DEC` |Decrease backlight level |