Why are some of the public domain images in the clipart section instead of the public domain section?
In general, I have placed public domain images in the public domain section. In cases where the pictures are relatively small and appropriate to a “clipart topic”, however, I have sometimes placed them in the clipart section as, for example, in this page of public domain fish clipart. One could, of course, use images from the public domain images section of coolnotions as clipart even if they are not in the clipart section. Placing images in the clipart section is just something I do when I think the images will be particularly useful to people looking for clip art.