Hi Steve - yeah circular array happens to not really be set up to have those kinds of in-viewport mouse feedback type parts to it. It is driven more off of just numeric input and that would be a good candidate for something along the lines of what you were talking about.

Probably something like an up/down arrow that shows up on the right-side of an edit field and lets you click or drag in it as another way to manipulate the value will make sense to do eventually.

It just was not a thing to focus on initially since the other method of snapping to points inside the viewport tends to help deliver accuracy in quite a few areas.

- Michael