Thank you, I appreciate.
In Finale, there is an option to disallow spacing for a certain layer/voice.
Is that possible in Dorico?
In that case, the spacing of the secondary layer (where trill notes are positioned, let us say voice4) doesn’t affect spacing, nor the spacing is calculated from it. The trill notes are entered as regular notes, with removed stem, scaled down and moved to the right. With a shortcut, that can be achieved with a keystroke.