Images are automatically resized to a thumbnail size and large size (without stretching). Your comment approval queue shows the image upload, so you can choose which the images you want on your site. After approval, the images are shown next to the comment. Clicking the thumbnail, opens a lightbox with the full image. If there are multiple comments with images on the same post, you can browse through the full size images in the lightbox.The built-in settings page allow you to specify additional CSS styles to customize the look, images dimensions, and file upload field label.