The configuration page, has you put in the User LED number that you want that button to activate (i.e. turn it on), you can then look at that LED with Brians or Macropump to perform some function. you can also put a User LED onto your screen sets to show its state. (please see the example screen set that comes with the plugin, it has a MP-03 "Page" that has ALL the functions, and example LEDs that come with the OEM set up. You can use it as is, OR, make your own screens or mods and use the OEM screen as an example.
scott