When you open a new listing, fill in your Subject line and type any text you want (including the price), and then find the "Add image to post" button. The screen will look like this one below, but of course it will have your info in it.
When you click on that button, a new window will open, that looks like this:
From there you can drag and drop your photos, or you can browse to find them on your device. In this example, I dropped in a photo of a bag I own. You can add more than one photo if you want. You can do that by dragging in several at a time, or by selecting several at a time. When finished, you click on "Upload", at the bottom of that window.
That window will close, and it will take you back to your original screen, but it will have automatically added the "url" which is the info the software uses to upload your photo(s). (So you don't have to put that in manually.) (In this example, it only added one line, since I only added the one photo of the bag in the example above. If I had added several photos, then there would be several lines listing several urls.)
When you are finished, you then click on "Post", at the bottom right corner.
