Edit the comment field of a locus.  The editor used
will be read from your environmental variable EDITOR. 
This may be set via 
``EDITOR=your-editor-choice; export EDITOR'' 
from the Bourne shell (sh), or via 
``setenv EDITOR=your-editor-choice'' 
from the C-shell (csh), and may be set up in your
``~/.login'' or ``~/.profile'' initialization files.
If EDITOR is not set, vi will be used. You will be
prompted for the number of the locus on which to
operate (default to the current sequence).  The file
name will consist of the locus name with a number
appended.  BEWARE - if the locus name has spaces, so
will the file name . . . this is o.k. for vi, but
EMACS barfs.  I suppose the file name should be doctored
to be valid . . .  When the comments are read
back in, a ``;'' will be placed at the beginning of
each line if it isn't already there.