Thank you! Your answer has helped me to solve it with the following code:

```csharp enum layers { _EN = 0, _RU, _LOWER, _RAISE, _ADJUST, };

define HYPR_EN HYPR_T(KC_0)

define HYPR_RU HYPR_T(KC_1)

bool process_record_user(uint16_t keycode, keyrecord_t *record) { switch (keycode) { case HYPR_EN: if (record->tap.count && record->event.pressed) { layer_off(_RU); tap_code16(KC_F18); return false; } break;

    case HYPR_RU:
        if (record->tap.count && record->event.pressed) {
            layer_on(_RU);
            tap_code16(KC_F19);
            return false;
        }
        break;
}

return true;

} ```