Sorry Brian H,
I have older units and I forgot that they even had ON/OFF buttons. My older units (have a couple of 6 units and an 8 -- had clear covers on the buttons and I popped them off and printed custom labels) Each button turns an x10 address on or off with a single press. These also work great as monitoring devices as the lights on them react to signal reception.
The KPLs have so much versatility build into them, that any user who set them up may forget the other options.
I certainly didn't mean to rumple any feathers. Just didn't know what was going on.
Steven R is using the even newer units with the dimmer/relay built in and really loves them in X10 mode.
I don't think the buttons are so easy to customize these days, and Smarthome makes the buttons up themselves that look way better than mine.