Bad decision on where to place slur?

[Frank Steinmetzger]

Hello list

I just finished typing some old, falling apart score and noticed some details 
that bothered me, namely some slurs that would be much better if they were 
above the notes instead of below, and vice versa.

I know that and how I can change their position manually, but I was wondering 
on what information lilypond decides on where to put the slur -- above or 
below the notes. See the attached screenshot of three examples, I marked the 
slurs which I think would be better placed on the opposite side (and not just 
in my opinion; the original from many a year ago has them the same way I would 
like them).

What’s your opinion? Cheers.
-- 
Gruß | Greetings | Qapla'
Help a man when he is in trouble
and he will remember you when he is in trouble again.

slurs.png
Description: PNG image