Indicate a change of key and have roman numeral analysis follow the new key

I’m new to Scaler, so perhaps I am missing something.

Currently, it seems that all Roman numerals are relative to the selected scale in section A. If you intend to modulate to a new key, it would be nice to have the Roman numeral analysis relative to the new key. Perhaps this might incur too many changes in the way Scaler works, as the selected scale seems to drive everything.