When creating normal constraints, you can first set creation options and then create a normal constraint, or you can immediately create a constraint with the current creation options.

Typically, you would want to first create a geometry constraint to constrain the object to some surface, and then create a normal constraint to constrain the object’s orientation so that it aligns with the normal vectors of the surface.

The default constraint options work well for constraining objects so that they aim along their local rotation positive X-axis.

To create a normal constraint

1. Select one or more target objects, followed by the object you want to constrain to them.
2. Select Constrain > Normal.