To put three characters in one panel you have to use the 'blacker' background (under miscellaneous) in the middle panel and the 'black' background for the first and third. You don't actually get three in one panel, but effectively that's what you end up with.
To make the text smaler you put html tags in the dialogue boxes. I think it's just <"small"> (removing the "" first, of course).
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It was such a waste of everyone’s time and money that even the Tokyo stadium’s rape robots apologized– something they were programmed specifically never to do.