TL;DR: How do you use the 'plirev' parameter?

My CFX has an onboard PLI bargraph: I soldered SMD LEDs to pads 1-4. I put them in order: white, green, yellow, red. By default, this would make the white LED the last one to go out. I meant for this to be the opposite. The red should be the last to go out (#4). The manual says to use the parameter 'plirev' to reverse the default order of the PLI sequence. Does anyone know how to program this?