Chaley, that's exactly what I meant (sorry if I didn't explain myself clearly). E.g. if you have no books rated, 'Rating' would not be shown in the tag browser (because there is no point in clicking on that).
It will be great to have this option in Calibre, thank you!
One more question, if I may hijack my own thread
:
When I posted this bug:
https://bugs.launchpad.net/calibre/+bug/1521004 (thanks a lot for fixing this, btw!) you suggested I should use a comma separated text, like tags column (with the "Contain names" box checked) for translators' names. Would you use the same type of column for original titles of books?
For what kind of data would you recommend using a single-value custom text column?