Paint_obj_zone [id two atoms] or [mol res1 res2 object]
The user is required to identify a zone in an object, which gets painted with the current colour. Useful for interactively making a picture where for example alpha-helices are one colour, and beta-strands another. The object can be specified by identifying two atoms in the object or by by typing on the same line, e.g.
pa_obj_z m14 90 110 ca