So let's say you have a areola size morph that you created on the default scale. So you decide to inflate the boobs up to some large size. And you realize that you want to scale the areola down back to its default size while leaving the breast still large and not changing the shape overly much. So you spin the areola scale dial down and you realize it's not working quite the way you expected. The areola is still huge. If you have another adjustment dial it makes things alot easier. You can mix varying strengths, make finer adjustments, and sliding loops is the best way to do this and not distort the overall breast shape. It's one of the reasons you see numbered morphs in the set I showed.