So we have a site that is using the SP Easy Image Gallery extension. While we are good with the function of the extension, the thumbnails are very blurry. Is there a way to increase the resolution of the thumbnails to be sharper?

Thumbnail: https://imgur.com/a/H75tphJ Full size: https://imgur.com/a/vo8SBNz

We saw that there is no parameter for that in the extension. Although we can increase the size of the thumbnail from 400 to 800 (or bigger) and they will look better, we were wondering if there is another way? We prefer the layout that is captured in the screenshots.