…states that ‘you can override the automatic order’ of a tucking index. This is true tuplet by tuplet, but where can I set Dorico’s default tucking index for tuplets, so that users don’t have to edit individual tuplets manually, each time they appear in a score?
You cannot change the default tucking index for tuplets, I’m afraid. It’s contextual, so having a default value that you could influence in every situation isn’t practical.
Yes, it is contextual. Dorico employs brilliant algorithms which could be set, for example, to place a tuplet square bracket ‘inside’ a longer phrase mark by default.
It could be that as I’ve imported an XML file, that Dorico is allowing other kinds of tucking for tuplet square brackets.