I often use Shift-Right/Left to extend note selection. Many times when selecting notes in a busy passage that way, I will overshoot and select one more than I meant to. My instinct from text editors is to press Shift-, which Dorico doesn’t map for that.
Until today, I hadn’t figured out a way to deselect that one note rather than cursing, starting over, and pressing the Right arrow caaarrreeefffuuullly.
The answer is (undo) Ctrl-Z. That’s unexpected, but Dorico seems very consistent adding minute selections to the Undo stack, so it makes internal sense.
The other discovery was to refine a large selection by selecting a larger region, e.g., by clicking in a bar to select its notes, and then control-clicking the notes you don’t want. I would like to be able to do this with the keyboard somehow. If anyone reading this knows how to do that, please chime in.