+## Modifiers
+
+By default, Auto Shift is disabled for any key press that is accompanied by one or more
+modifiers. Thus, Ctrl+A that you hold for a really long time is not the same
+as Ctrl+Shift+A.
+
+You can re-enable Auto Shift for modifiers by adding another rule to your `rules.mk`
+
+ AUTO_SHIFT_MODIFIERS = yes
+
+In which case, Ctrl+A held past the `AUTO_SHIFT_TIMEOUT` will be sent as Ctrl+Shift+A
+