[NTG-context] Tolerance etc.

Now and then, particularly with narrow pages, a paragraph just doesn't come out right and a line sticks into the right margin. In plain I always fiddled with \tolerance, \pretolerance and occasionally used \looseness to fix things up. Should I continue to use these primitives or is there a more Contextish way to handle these situations? BTW I am using both optical alignment and the hz business. Not sure that the latter is working. -- John Culleton