You can apply geometric constraints to a selection set of geometry within the specified
tolerance set using the AutoConstrain tab in the Constraint Settings dialog box.

The following prompts are displayed.

Select objects

Select the objects that you want to be geometrically constrained.

Settings

Displays the Constraint Settings dialog box with the Autoconstrain tab selected. In
this dialog box, you can change the types of constraints applied, the order in which
they are applied, and the applicable tolerances.