When I upload an image to a Drupal 7 node_gallery gallery, a thumbnail is automatically generated. This is good.
However, the thumbnail is also cropped to a square size. This is bad. (But note that the full-sized image is not cropped.)
I want the thumbnail to retain the original image proportions (often 2:3 or 3:4), the same as the full-sized image (just smaller), rather than being cropped to a 1:1 format.
How can I do that? Google was distinctly unhelpful in this case, showing me results only for old versions of Drupal, and even then those solutions were mostly for other problems.