Metadata Jacket with custom columns values?

[Horus68]

Creating a Metadata Jacket will only fill the jacket with the basic metadata value.
Is there a way to insert metadata from custom columns?

This would also require a setting to choose the custom columns to insert.

[kovidgoyal]

Yes replace the jacket template. https://manual.calibre-ebook.com/cus...ates-et-cetera

[Horus68]

Perfect, easy and simple!

To change book jacket displayed columns I went into the source folder:
C:\Program Files\Calibre2\app\resources\
and copied the folder named "jacket" into the Calibre configuration folder:
C:\Users\...\AppData\Roaming\calibre

Now in the copied "jacket" folder edit the file template.xhtml to dispaly a custom column as explained in the comments included in the file and it will override the default jacket template

        <!-- 
        In addition you can add code to show the values of custom columns here.
        The value is available as _column_name and the title as
        _column_name_label.  For example, if you have a custom column with
        label #genre, you can add it to this template with _genre_label and
        _genre. Note that the # is replaced by an underscore. For example
        
        <div><b>{_genre_label}:</b> {_genre}</div>
        -->

Side note: the user manual says path for windows is C:\Program Files\Calibre2\resources but my resources path is inside "app" folder as in C:\Program Files\Calibre2\app\resources\
(using Calibre 4.8.0 - windows10)