How to jump with ediff

[Haines Brown <haines@histomat.net>]

I'm trynig to use ediff to find a difference in one buffer and 
use that information to edit another buffer. 

The files are split vertically. Howevewr I do not know how to jump 
from one difference to the next. I hear about using n and p to jump 
but cannot because the buffers are writable.

What I would like to do is jump to the next diff in one buffer in sync 
with a jump in the other buffer so that I am automaticall looking at 
the same region in both.

Haines Brown