When I tried uploading another image to replace the original one, the new Thumb Height and Width values I set in Media Configuration were visible on the front page. Is there a way to automatically update the thumbnail size without having to re-upload each image individually? Also,is it possible to automatically resize images proportionally based on their width only, regardless of whether they are in landscape or portrait orientation, instead of setting a fixed Thumb Height and Width value? I think it would be more flexible that way.