The comment tool is great, but sometimes I wish it were easier to read a comment without having to double-click it, or open the comment panel on the left. It just occurred to me that something like a tooltip for a comment could be useful: if you hover over a comment, its contents could appear in a floating window.
Just an idea; I don’t think I’ve seen it here on the forum. And of course you can’t mouseover on the iPad, so that could be a problem.