Conradasman, Thank you for your reply.
For some reason, The Roman numbers are above the staff in this example but I want to use natural harmonics in this case.
On a violin, a B (natural harmonic) on the 4th string (G) will sound 2 octaves + a third higher B
Same for an A on the 4th strings (E) of Double bass
And it’s not an open tuning 
So it would be nice if Dorico could include natural harmonics in low positions in its collection 
