[01100001]

Under Preferences > Look & feel > Book details > Text styling it appears you can style the content shown in the Book details pane.

This is what I am referring to:



I am looking to style a custom column/field and its content in the Book details pane (called Filenames2 (#filenames2)). It looks like this (and is based on the help received from our members here):



But I don't know what their HTML ID attribute values are so I can use them and style them using CSS. Also, I cannot be sure what their HTML markup looks like.

I tried a couple, and neither is working:

#_filenames2 ul,
#_filenames2 ul li {
    padding-left: 0;
    margin-left: 0;
    text-indent: 0;
}

#_filenames2 li {
    user-select: all;
}

ul,
ul li {
    padding-left: 0;
    margin-left: 0;
    text-indent: 0;
}

li {
    user-select: all;
}

Question: What am I missing here? Also, is there any way to view the markup of the actual fields and their values being shown in the Book details pane? (I know there's a partial example shown in the Preferences > Look & feel > Book details > Text styling field.)