Saving JPGs after having used the cropping tool

Recently i found, that the files sizes after cropping/saving images are substantially smaller. The amount of cropping was minimal, just removing some thin frames around the picture, not more than maybe 5% of the whole image. So, for example, a former 6MB file would end up as maybe 2MB afterwards. I couldn't find a setting for 100% quality for that specific function in the image viewer. Can this be tweaked somehow?

Using Save As instead of Save will let you specify the quality level.

Yes, i considered that already, but was curious if there is a tweak. So now i need to re-record my macro automatisation, because i have a couple of thousand images which have those frames, and it saves me a lot of time. Thank you, Leo.