[@Dave, probably because After Effects has the ability to easily condense control of many layers into one place, with modifiers, making working with complex setups infinitely easier. This is a pretty common practice.] If I'm understanding your question correctly, you might just need to add a simple offset to your y value. [value[0], temp-540] If that doesn't get you where you're going, check out the linear function. It allows you to do things like having 1-100 on a slider correspond to 0-360 in rotation, for example, or... pretty much whatever else you might want. You can turn any number range into another number range, and they don't have to be the same type or "distance," as it were. It's kind of hard to explain in words; there's a good video tutorial here.
... View more