The only way I could find to post photos was to register at a site that can serve as an address for them so you can post them in the URL box when clicking on the square landscape image from above.
The site I use is imgpile.com and it’s free to register with and there seems to be no limit as to how many images you can upload, just the size of them. It’s pretty much self explanatory and fun to use.
When selecting which image to use, just right click on it and choose copy image address and then paste it in A'gon's URL box after clicking on the above icon mentioned.
All the best,
Nonoise