Control constraint inference and automatic constraints

To prevent constraint inference while creating an object, hold the Ctrl key while sketching.

To disable all constraint inference, click Sketch tab Constrain panel Constraint Inference .

To explicitly select constraints to infer, click Sketch tab Constrain panel Constraint Options .

Note: Coincident constraints at the end point of lines are always inferred and persist unless specifically disabled in the Constraint Options. This behavior prevents the creation of open sketch profiles.