Autoconstrain Tool
You can use the Autoconstrain tool to find the specified constraint types and automatically set up constraints.
Select Autoconstrain in the Constraints group.
Select the Curve options to allow points and/or axes to be considered for creating constraints.
Select the constraints to be automatically set up from the Constraint Options list. The following constraints can be set up:
Coincident constraint
Tangent constraint
Parallel constraint
Perpendicular constraint
Equal radius constraint
Concentric constraint