Originally Posted by JanMM

Just took a look at the SRAM front shifters on my 3 bikes. They have an L at one end and an H at the other. They are not indexed in that there is not a single setting for small, middle and large rings but instead there are, I think, three settings for each of the three rings. Use whichever works best for the gears you are shifting to. Won't take long to figure out what works best. All the way to L or to H usually works best for me for big or small rings, assuming things are adjusted as they should be.