Hi Simon,
I understand. Let me ask you then, where should this behavior be documented? Perhaps in the section about
modifying shapes in the Notation Reference?
Currently it states:
Known issues and warnings
It is not possible to modify shapes of ties or slurs by changing
the control-points property if there are multiple ties or slurs
at the same musical moment – the \tweak command will also not
work in this case. However, the tie-configuration property of
TieColumn can be overridden to set start line and direction as
required.
Since contrary to the above this is indeed possible (as proved by the example shared by Harm), could this paragraph be updated instead? I think we can all agree that the documentation needs to convey accurate information.
I was going to write a longer message but this has already gone too out of thread. I don't know where/how this kind of issues are supposed to be discussed. If you could point me in the right direction I'd be happy to bring this up in the right place and in the right manner.