Hi Doug,
Thanks for the response. I'm still a bit confused.
Let's just say that I have a vertex index that I determined on the surface of my FS average surface (created by 'make_average_subject'). Now I simply want to find the corresponding vertex index on all the source subjects.
How can I do just this, i.e. map a single vertex from the average surface to all the subjects?
Thanks very much! Ola