nConstraint > Point to Surface
Creates a Point to Surface nCloth or nParticle constraint from the selected nCloth object vertices or nParticle object components to a target surface (an nCloth object or a passive object).
See Point to Surface constraintand Creating an nCloth Point to Surface constraint.
nConstraint > Point to Surface > 
Opens the Create Point to Surface Constraint Options Box window for the Point to Surface operation. In this window, you can turn on Use Sets to add the selected nCloth or nParticle object components to a dynamic constraint selection set.