WetGeek I was trying to figure out command history
Just to be clear, command history works the same way as it always has ... with Up and Down keys. I'm not sure why I was trying to find a way to use the mouse scroll wheel for that, but I realized my mistake right away.
By the way, after using Terminology for a bit, I've discovered some of its rough edges, but so far nothing that would affect my using it, just minor annoyances. Still, I'm keeping Konsole close at hand, in case I ever DO find a showstopper in Terminology.