I did some research first and found Daniel’s replies to previous related enharmonic spelling queries on Google, from 2012 to 2016. I’ve had no problem respelling single notes as directed by Dorico but can’t find a method to change just one note of a single voice chord. For example in the example shown I want to change just the F double sharp to G, leaving the rest unchanged. Is that possible with a simple remedy?
To respell a note ‘upwards’, select it (in Write mode) and type alt-=
The downward equivalent is alt-minus.
If you’re struggling to select just the one note, click the whole chord. The Up arrow key will take you from the bottom note of the chord up through each of the other notes in the chord, and the Down arrow key will take you from the top note of the chord down through each of the other notes in the chord.