Creating a Matching Constraint

Updating Network and Work with Constraint Manager

Before you begin:

In Me > Preferences > Common Preferences > Object Properties > 3D Shape > Display, 3D Shape Infrastructure tab, Display in Tree section, select Constraints to see the constraints in the tree.
In Me > Preferences > App Preferences > 3D Modeling > Styling > FreeStyle Shape Design, General tab, Matching Constraint command options section, select Mean Surface Solver.
Open a 3D shape containing surfaces.

Create the first constraint.
Click OK.
Create the second constraint.
Again do not click Apply
Click OK.
Right-click any of one of the two continuity types and select Update Network to update both the constraints.
You can also update both the constraints by clicking Update all in the Update Flyout of the action bar.

The mean surface is computed.