This sets Default Layer to given parameter `layer` and activate it.
- ACTION_DEFAULT_LAYER(layer)
+ ACTION_DEFAULT_LAYER_SET(layer)
#### 2.2.2 Momentary
ACTION_BACKLIGHT_STEP()
+Turn a specific backlight level on or off.
+
+ ACTION_BACKLIGHT_LEVEL(1)
+
#### 2.5.2 Turn on / off backlight
Turn the backlight on and off without changing level.
+### 3.5 Momentary switching with Modifiers
+This registers modifier key(s) simultaneously with layer switching.
+
+ ACTION_LAYER_MODS(2, MOD_LSFT | MOD_LALT)
+
+
+
## 4. Tapping
Tapping is to press and release a key quickly. Tapping speed is determined with setting of `TAPPING_TERM`, which can be defined in `config.h`, 200ms by default.