How to disable multiple carets entirely?

There is a feature where multiple cursors ("carets"?) will appear when I middle mouse click and drag.

I prefer middle click and drag to just scroll through the file.

I can not find where to disable this multiple cursor functionality. I have seen this help page, but I don't see anything in particular to turn this entirely off: https://www.jetbrains.com/help/rider/Multicursor.html