Виноградов Юрий wrote:
Excuse me. I didn't understand what needs to be inserted in "." . Or how to
operate them.


The attached snippet has the modification I suggested.
It positions the closing bracket correctly when using 2.24.4.


Cheers,
Robin
%%% HACKED SNIPPET: %%%

\header { tagline = ##f }

#(define-markup-command (openBracket layout props height) (number?)
  (interpret-markup layout props
    (markup #:line (#:with-dimensions-from "." 
      (#:path 0.25
        (list (list (quote moveto) 0 0)
        (list (quote lineto) -1 0)
        (list (quote lineto) -1 (* height -1))
        (list (quote lineto) 0 (* height -1))))))))

#(define-markup-command (closeBracket layout props height) (number?)
  (interpret-markup layout props
    (markup #:line (#:with-dimensions-from "." 
      (#:path 0.25
        (list (list (quote moveto) 1.3 0)
        (list (quote lineto) 2.3 0)
        (list (quote lineto) 2.3 (* height -1))
        (list (quote lineto) 1.3 (* height -1))))))))

\new PianoStaff <<
  \new Staff \relative c'' {
    a^\markup \openBracket #14 
    c'^\markup \closeBracket #16.5 
  }
  \new Staff { \clef F c' c' }
>>

%LSR prevent clipping
\markup \vspace #1

%%% SNIPET END %%%

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