When you do the yellow image box you don't need theI normally use TinyPic, which gives me several variants. But none seem to work here whether I copy the URL directly or use the "Insert Image" (Yellow box).
For example, an image is below with the proper tags. But it doesn't show up.
When I drag and drop from my computer it works.
PC or Mac? If Mac, easiest to use is Preview. 900px longest edge is good.Need a good program to reduce. What is max size or pixels ? I am still trying figure it out.