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Appendix D Point and click

Point and click lets you find notes in the input by clicking on them in the PDF viewer. This makes it easier to find input that causes some error in the sheet music.

When this functionality is active, LilyPond adds hyperlinks to the PDF file. These hyperlinks are sent to the web-browser, which opens a text-editor with the cursor in the right place.

To make this chain work, the following should done:

The program lilypond-invoke-editor is a small helper program. It tests the environment variable EDITOR for the following patterns,

emacs
this will invoke
     emacsclient --no-wait +line:column file

vim
this will invoke
     gvim --remote +:line:normchar file

nedit
this will invoke
       nc -noask +line file'

The environment variable LYEDITOR is used to override this. It contains the command line to start the editor, where %(file)s, %(column)s, %(line)s is replaced with the file, column and line respectively. The setting

emacsclient --no-wait +%(line)s:%(column)s %(file)s

for LYEDITOR is equivalent to the standard emacsclient invocation.

The point and click links enlarge the output files significantly. For reducing the size of PDF and PS files, point and click may be switched off by issuing

#(ly:set-option 'point-and-click #f)

in a .ly file. Alternately, you may pass this as an command-line option

lilypond -dno-point-and-click file.ly

Footnotes

[1] On unix, this file is found either in /etc/xpdfrc or as .xpdfrc in your home directory.

[2] On a typical unix system, this file exists or must be created in your home-directory as .mozilla/firefox/default.trn/user.js or .firefox/default/xxxxxxxx.xxx/user.js, see location and profile.


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