To me it just makes sense that one should be able to delete them one at a time if one wanted to. I know that I can delete the whole folder but I don't see a way to delete them singlely(?). Some of the pictures aren't worthy of being a desktop and I would like to delete them. When I do that they end up in the Pictures subfolder under the Folders label. The Folders>Pictures in System Preferneces>Desktop/Screensaver are pictures that I got off Facebook when you right click on a picture someone has posted and you have the option to set as desktop.
Thank you, I see you understood my question.