There are times when simple sketches are adequate for your design process, but you will often need to work on more complex sketches requiring a rich set of geometric or dimensional constraints.
About Constraints Creating Contact Constraints What about Constraint Visualization? Working with Dimensional/Geometrical Constraints Defining Measure Directions Modifying Constraints Creating Constraints via a Dialog Box Applying Same Constraints to a Set of Elements Creating a Curvilinear Distance Constraint Creating Constraints with the Background Elements Modifying Constraints On/Between Elements Auto-Constraining a Group of Elements Editing Multi-Constraint Animating Constraints Working with Groups and Using a Catalog