Dear Doctor, Thank you for your inquiry. The measurements are set with different mean and standard deviation (SD) values based on age and gender. In the younger patient population, there is still some growth potential in the mandible, which is why the standard ANB values for younger patients are set higher. Unfortunately, modifying the default measurements would apply the changes to all users, so it is not possible to do so. However, we can duplicate the measurements and share them with you, allowing you to make the necessary modifications for your personal use. Please note that the feature to share analysis methods and measurements is currently a Premium feature, and only Premium members can have these measurements shared with them. Thank you for using WEBCEPH.