Bug report: Setting marcato accent to above the staff doesn't work properly.
I set marcato and some other accents in Style/General/Articulations and Ornaments to "Above staff". And that works partially. If I click on "Apply", it will move any below the staff in the current score to above the staff. And if I drag an accent from the Articulations and Ornaments window to an existing note, it will go above. But if I highlight a note or series of notes and double-click on the symbol in that window, the accents go below.
The workaround, if that happens, is to select the notes with the below-staff accents, copy them, and paste them back to the same location, which moves them above. Of course from now on I'll drag rather than double-click, but just something to fix in the future.