Button states 101 5 stage buttons:
1) OFF
2) Press (clicked)
3) Hover (glowing)
4) ON
5) Dead / Inoperable / Not available (all buttons are in this state when no project is loaded)
In X1 thru X3 there were 1 stage, 2 stage, 4 stage, 5 stage, 7 stage, & 8 stage buttons. 5 being the most common.