This is meant to be a test for support in the image previewer or resizer used in Wikimedia projects of various images. Although all these images can be viewed in web browsers, without their support by the image previewer or resizer used in Wikimedia projects (whereever the poblem lies), they can't be seen on their description pages and can't be used in articles. Most of the image formats in a certain settings have certain advantages over others, such as in size, support for multipage or animation. But more importantly, other than the XCF also tested here, these are the common raster image formats, with their well-established supported settings. For the Wikimedia projects to best use graphics, there needs to be support for these formats in its image previer or resizer, thus making these settings and formats able to be used in Wikimedia projects. Look at the other versions gallery to see which files can and which can't be previewed.