Ornaments are positioned above the note they apply to by default. However, turns are frequently positioned between two notes. There seems to be no way of doing this without manually adjusting them in Engrave mode one at a time. I would have hoped that if you select two notes and apply a turn then it would be positioned between the two. Might that be something worth adding to the list of things to look at for the future?
And another one; will it be possible to put editorially added ornaments in parentheses?