There are indeed a couple of settings in Engraving Options>Spacing gaps, thought the spacing in your example has more to do with the voice column indexes.
I would say that you could make your example look better just by flipping (change the direction of the stem) the C (if you need to show the three voices) or if you put the C in the same up stem voice as the A.
Hey Rafaelv and Daniel old buddy going back at least 15 years
Thank you for your excellent observations.
This piece is for classical guitar.
I want the notation to be universally acceptable for notating classical guitar music (my own compositions).
Both your suggestions are great. With the flipping of the C eighth up rather than down as Daniel suggests, the result looks very good, but I wonder if this is acceptable guitar notation.
I am just getting into guitar notation requirements because I want to typeset over 80 pages of my olden days guitar compositions, and I want the typeset result to be absolutely perfect.
I will be publishing all the little pieces as a book/books as well as downloads.
Best wishes to you all, and I remain absolutely gobsmacked at the power of Dorico