Controlling the length of a broken beam

[Yoshiaki Onishi]

> I have a Chopin piece where the notes form a broken beam across a key change 
> and break (see first attachment broken-beam-over-key-change.)   LilyPond has 
> drawn the stem and beam long in the upper right-hand corner to avoid the key 
> change.  I'm not sure I like that and I'm trying to change it.  I can shorten 
> the stem with the \alterBroken command but then the beam collides with the 
> key change (see second attachment broken-beam-over-key-change-modified.)
> 
> Is there a way to shorten the upper right-hand broken beam?  Below is the MWE:
> 


Dear Knute,

Adding the following just under your \alterBroken line:

\alterBroken break-overshoot #'((2 . -8) (0 . 0)) Beam 

…does seem to do the trick. Reference is:

https://lilypond.org/doc/v2.24/Documentation/internals/beam_002dinterface

All the best,
Yoshi