The line tools horizontal and vertical are GREAT but when will it be possible to draw a full box around a portion of notation - and not by using a graphic import to do it? This would be so good for the analytical based annotation of music examples.
You can always use a text frame with a 1pt border. It’ll stay with the page, rather than the music, of course.
It’s already just about possible using the line tools. John McKinnon did a nice video on it a while back: Aleatoric Boxes in Dorico 3.5 - YouTube