Hi Paolo, I think you’d want a callback that tweaks shorten-pair?
Look at <http://lilybin.com/vf4vaj/2> for an idea of what the final result might be. Hope that helps! Kieren. > ---------- Original Message ---------- > From: Paolo Pr <paolopr...@gmail.com> > Date: December 8, 2019 at 6:40 PM > > > Hello, > > in cross-staff systems, I see that the ottava bracket can produce an unwanted > collision between the "8va" string and the stems. Please, look at: > > http://lilybin.com/vf4vaj/1 > > Is there a way to automatically avoid that, without using the trial-and-error > method for adjusting the offset of the object? > > Thanks