I am unsure of the question here.
You can change the default load variation limit (from 25%) in the model's Hanger Control Data.Set this before you enter a hanger to be sized and your new load variation limit will appear as part of your design data. See below.
Also, you can push CAESAR II to select a constant effort hanger if the change in position is greater than a specific value, e.g., 50mm. See below.