Re: Two short questions

[Malte Meyn]

Am 28.12.2017 um 16:03 schrieb Jérôme Plût:
> 1. I am typesetting some music which is in 2/1, and mark using a cut
> time signature. How is it possible with Lilypond to put a ℂ symbol for
> a 2/1 time ? (see attachment, line 1)

  \time 2/1
  \set Score.timeSignatureFraction = 2/2

> 2. In virtually all orchestra scores I play the alphabetic marks skip
> the letter J. However format-mark-box-letters skips the letter I. So
> at each rehearsal this confuses all my colleagues. Since they are
> obviously slow to learn that I == J, does there exist a simple way to
> make a format-mark-box-letters that uses I instead of J, or should I
> start scheming something out of of make-markalphabet-markup?
> (see attachment, line 2)

I made a generic mark formatting function that can do that, I just have 
to find it, give me some minutes ;)