Dorico 3.5 does not seem to be behaving in the way described in the 3.5 manual here:
I’m in a part, trying to insert a graphic image into an unpitched percussion part (to be seen in the part only), to insert a pitched cue (so player does not get lost).
Dorico won’t do that for unpitched percussion instruments, I guess because inserting a 5-line stave into a single-line stave has not been programmed-in as a function (yet?)
When I follow the manual’s procedure as described above, no ‘Insert graphics frame’; button is shown and the buttons which are there, seem deactivated in Part view.
This page has been reformulated somewhat in the v4 manual in the way the information is presented (as a prerequisite and with an image of what the button looks like as another pointer) but the underlying functionality hasn’t changed.