dgarretson, everyone
lots of words, but easy once you understand the image must be on the web somewhere, and you post the image's web address (url), not the image itself.
1. find an image already online, right click, 'copy image address'.
2. post window, top edit bar, click on 6th icon from left, 'image'
3. paste the url you copied into the window that pops up
4. OK
DISTORTED IMAGE?
sometimes you need to enter 600 in the width to keep a larger image from getting distorted. (height self-adjusts to the entered width)
upload your photos.
Once I figured out how to use Audiogon's Virtual Systems,
https://www.audiogon.com/systems/users/elliottbnewcombjr?_gl=1*15fyfjw*_ga*MTQ0MzA1MzQ4Mi4xNzUyNzEzMTU1*_ga_SR0PMVVEN1*czE3NTM5NjMyOTMkbzUkZzEkdDE3NTM5NjQyMjckajYkbDEkaDE2NzgwMzI2NzA.
To post any image on my computer, I made a separate Virtual System called 'Misc Info' on this site, so I can upload any image to Audiogon's web site, then 'copy image address