The Enigma Machine simulator controls:
Input: keyboard keys A - Z
Change plugboard: CTRL + [key 1, A - Z] + [key 2, A - Z]
Change rotors: CTRL + [rotor number, 1 - 3] + [rotor name, 1 - 3]
Reset rotors: CTRL + SPACE
Note that in some browsers you will first need to click on the simulator to use it.