These core libraries allow a 32u4 based boards or Due and Zero board to appear as a native Mouse and/or Keyboard to a connected computer.
I'm trying to use the keyboard library however it seems I don't have the library. I just redownloaded the Arduino IDE, but it doesn't seem to come with the keyboard library. I found someone else's github that had it and downloaded that and included it, however I also don't have the HID.h library that the keyboard.h file includes. Any idea?