See
https://github.com/wbsoft/frescobaldi/issues/573
In that wish I asked if it is useful or just a personal use case.
So anybody who wants to use indented lines for such cases might add a
comment there (to "upvote" it).
I have added the following comment on GitHub:
I agree that the loss of user-intended indentation is a problem with
Frescobaldi's format feature, but I don't think this is a complete
solution.
As I understand it, the idea is that the %/ combination signifies that
the _following_ line is to be given one extra ration of indentation,
so code entered thus...
a b c d
b c d e %/
c d e f
d e f g
...becomes...
a b c d
b c d e %/
c d e f
d e f g
...with the fourth line dropping back to Frescobaldi's default
indentation.
This means that every line that is to be indented will have to be
preceded by %/, and that there is no way of forcing double indentation.
How would you propose switching off the %// indentation if it isn't
automatically switched off in following bars?