diff --git a/config.def.h b/config.def.h
index 4e30885..db0babc 100644
--- a/config.def.h
+++ b/config.def.h
@@ -154,6 +154,9 @@ static const Key keys[] = {
 
 	/* Ctrl-Alt-Backspace and Ctrl-Alt-Fx used to be handled by X server */
 	{ WLR_MODIFIER_CTRL|WLR_MODIFIER_ALT,XKB_KEY_Terminate_Server, quit, {0} },
+	/* Ctrl-Alt-Fx is used to switch to another VT, if you don't know what a VT is
+	 * do not remove them.
+	 */
 #define CHVT(n) { WLR_MODIFIER_CTRL|WLR_MODIFIER_ALT,XKB_KEY_XF86Switch_VT_##n, chvt, {.ui = (n)} }
 	CHVT(1), CHVT(2), CHVT(3), CHVT(4), CHVT(5), CHVT(6),
 	CHVT(7), CHVT(8), CHVT(9), CHVT(10), CHVT(11), CHVT(12),