ACTION_LAYER_MODS(2, MOD_LSFT | MOD_LALT)
-This function can only register left-sided modifiers. The handedness of the modifier (left/right) is an extra bit that is not able to be passed through into the layer system. See: [`common/action_code.h`](../common/action_code.h), the spec for ACT_LAYER_TAP only allows four bits for the mods, whereas the mods themselves require five bits, with the high bit being the left/right handedness.
+You can combine four modifiers at most but cannot use both left and right modifiers at a time, either left or right modiiers only can be allowed.
## 4. Tapping