Is it possible to add parenthesize notes (Finale names is parenthesize) for notes to remember the musician that a note is changed or back to original key?
Setup → Notation Options → Accidentals
Also, in the Properties, under Notes and Rests, you can force the accidental to appear case by case, parenthesized or not.
I think Cees is asking to make the noteheads themselves parenthesised, to show an enharmonic equivalent. I’m afraid Dorico doesn’t yet have support for parenthesised noteheads, or indeed for stemless noteheads, but both are in our plans.