::At first, many moons ago, I began changing "3" (the usual number of columns I found in the Refs sections) to "30em".  I don't remember who the editor was, perhaps it was (?), but I was told that the tablet they used did not render 30em very well at all, and that 20em worked much better for them.  So I've been using 20em ever since.  As this is an important accessibility issue, I would advise all to be as sensitive as possible to the needs of others.  If this means that 30em is better for some but not all, and those some can live with 20em even though it's not quite as good for them as 30em is, then to be accessible to all, the choice should really be 20em, or perhaps slice it down the middle to 25em.  Since I abhor edit wars, I would ask that everyone continue to stay on talking terms and not resort to such things. Thank you very much and Best of Everything to You and Yours! – ''