ok here is a pic. now you will see three things highlighted in yellow, the first one is the new button. you will want to click that to make multiple presets per channel or per set of dmx traits.
Now once you hit "New" a window will pop up and then from there you will be able to select your lowest and highest dmx values for that preset. simply click on the arrows next to the boxes and the numbers will expand. once your done hit "OK" and it should be ok. Let me know if this make sense to you or not. Thanks.