* `#define TAPPING_TERM 200`
* how long before a tap becomes a hold
+* `#define RETRO_TAPPING`
+ * tap anyway, even after TAPPING_TERM, if there was no other key interruption between press and release
* `#define TAPPING_TOGGLE 2`
* how many taps before triggering the toggle
* `#define PERMISSIVE_HOLD`