Good morning,
To switch a leader’s arrow from one side of a note to another, you can turn it’s control points on, and use the square (scale) handle to move them. If you don’t turn on the control points and drag the square (scale) handle (say from left to right or v.v.) the note flips upside down. Not flipped horizontally, but flipped vertically.
This is also true of text.
Any thoughts?