I notice that there is, in this editor for creating the text of the question, an icon that says "Insert/Edit image". However, when I click on that, it does not give me an option to upload an image. It seems to expect a URL for an existing image somewhere out there on the Web. This is rather inconvenient. If I wanted to upload an image that I've captured (from my web site, for example) into a file, how would I upload it in a question in this forum?