Good point about converting linear motion to rotary for mouse users. I hadn't considered that as I only ever use touch screens and touch pads so to me the rotar

Good point about converting linear motion to rotary for mouse users. I hadn't considered that as I only ever use touch screens and touch pads so to me the rotary is just fine (aka, touch the option you want). That said, it's just a radio button, would you expect radio buttons to activate on scroll too? For continuous numeric inputs I modeled the slider, and enabled scroll control. One issue there is intercepting horizontal scroll on touchpads is flakey and about two thirds of the time you go back instead of moving the thing right.