It would be great if there as an extra option: "Center". This would make it much faster to auto-center media that has odd dimensions, to avoid going through the math in the Surfaces tab.
I have a piece of paper on my desk with input position specs for converting from 16:9 media to square (and vice versa) with proper centering, along with some other common conversions. An auto-center option would make this unnecessary

Thanks for your consideration!