How to exclude images from being optimized?
You can exclude images or folders from optimization by using our feature Exclude Patterns (on Settings > ShortPixel > Advanced). For more details about how it works, and about how to use regular expressions to select specific files, please read this article: ShortPixel: How to exclude images and folders from optimization.
Another way to prevent images from being optimized, which is useful in case your image library is not so big, is to just select all images on your Media Library that you do want to optimize, and keep unselected the ones you don't want. For example, this will optimize all the images except the one called ShortPixel_3008x2000.jpg: