Editing photos after a sale listing is posted

Any wisdom for an occasional Audiogon seller on editing photos after I posted an item for sale?  I don't have a lot of Audiogon sales experience but sell stuff on e-bay all the time.  I have a few things to sell and just today tried posting my Rotel RCD-1572 using a pay now listing as my :pilot" posting.   I THOUGHT... I'd have an opportunity to edit and revise the pictures I posted but...  Now that my listing is live, although I HAVE found the "edit" dropdown option and I CAN change some things all I seem able to do is re-arrange, delete, but not add, substitute or rotate photos.  I tried using both Firefox and Safari to no avail.  Thanks in advance for any advice of instruction links.

Thanks,

Matthew