As you are adding geometry to your component family, you need to constrain the geometry to the parametric framework previously created. For the best results, the sketches of the geometry should be constrained to the reference planes driving the parametric relationships.
To constrain the sketch of a piece of geometry during creation, use the Align tool and select the specific reference plane and the sketch line to establish the constraint. When the lock symbol displays, click it to lock the constraint. If the constraint is labeled, then the parameter created from the constraint will allow the geometry to adjust with changes to the parameter.
