build a chord from single selected note

What if I want to create a chord using notes of different note values within the same voice and I do not want Dorico to renotate the existing notes? In printed Literature for Violin there are often chords with notes of shorter duration - eg quarter - on the deep strings and and half notes on the higher strings.
How can I do that? Force duration does not help.
Do I overlook something or is this not possible yet?