ottava sign placement and bracket length

[Sepand Shahab]

Dear list,

how can I adjust the bracket span length and 8va sign placement (horizontally) on a case by case basis?

I found the ottava bracket interface section in the manual but am not sure how to implement it:

http://reinhold.kainhofer.com/~lilypond/Documentation/internals/ottava_002dbracket_002dinterface.es.html


Many thanks,
Sepand