Hi Simon,
I understand your point and it makes more sense after the key signature.
But do you have any real life examples for that position (I hear people
complaining about the “wrong” ambitus placement in LP)?
I encountered only about 3 ambitus examples in my life and all where
before the clef. I don't know if there are any rules, so I am just
asking whether there is a reference? After all it is the aim to
reproduce best standards (not to invent them), or not?
I would find it even clearer if it would always show the accidental
independent from the key signature (like having two e-flats with
accidentals here: ambitus: <es es'>, \key bes \major.
Btw, it seems to be quite complicated to create an ambitus in Sibelius:
http://www.rpmseattle.com/of_note/how-to-create-an-ambitus-in-sibelius-7-part-1/
It needs a whole tutorial.
Cheers,
Joram