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in reply to Re^2: Size of text in replies when showing threads (options)
in thread Size of text in replies when showing threads

Sadly tr.reply-body ul.indent { font-size: 80% } won't work, because that applies doubly to replies of replies so the font of those is set even smaller, so deep threads get very unreadable. The old font tag worked because it set an absolute font size, whereas the "80%" in CSS is relative to the parent.