Sorry - just noticed this note in the Help file:
Important Note. Before attempting to redefine any symbol shape you must
refer to the Appendix F Section of the ISOGEN Options Manual. There you
will find a tabulated list, containing for each symbol :-
{ Description
{ SKEY
{ basic outline shape
{ And a flag indicating whether or not that shape is User Definable
Only those symbols containing a Y in this last field may be redefined !
Where do I find the "ISOGEN Options manual?
Thanks