Board Thread:Support Requests - Getting Technical/@comment-24744024-20140828022850/@comment-4018164-20141026144606

If i remember correctly, there's a file dimensions range at which gif images can be resized, but it's only available in galleries. In addition to what Rocketman said, you can also use some image editors like Photoshop or GIMP to scale the image instead of using a generator. A wiki that uses DynamicImages will animate its static GIF thumbs automatically.