Use the Regression Data and Profile Entities vistas to edit parameters of profile entities that were created by best fit.
The Regression Data vista displays the source regression data from which the best fit entity was created. The regression data can be modified either before or after the entity has been created. The information in the Regression Data vista can be changed, and then applied to the entity. If the entity parameters are changed outside the Regression Data vista, the entity can be synchronized to the current regression data.
The Profile Entities vista displays a form that is like a spread sheet, where each row represents a profile entity and each column represents a parameter. When an entity is created by best fit, Best Fit is displayed in the Constraint2 column. Click 
in this column to edit the source regression data.
Regression data is not dynamically linked to the best fit entity. If the entity is edited, 
appears in both the Regression Data and Profile Entities vistas.
Editing Floating Best Fit Entities
The manner in which a best fit floating entity reacts to edits to the attachment entity depends on whether the best fit entity is synchronized with the best fit sample data.
- If the floating best fit entity is synchronized with the best fit sample data, it maintains tangency when the attachment entity is edited. The floating best fit entity geometry changes to adapt to changes to the attachment entity, and continue to honor the regression points.
- If the floating best fit entity is not synchronized with the best fit sample data, it behaves as a normal floating entity. The floating best fit entity remains tangent to the attachment entity, and its geometry will not change to honor the regression points.