Hello Matthew,
If you would like to download a copy of the image, please use the search option at the top of the screen in Accounts Payable. Once you have the appropriate search in place, when the images display you can select the appropriate image and then download the invoice image, by using the download option. I have attached a screenshot of the download option that is available when viewing images from the Search Option.
At the present time if you are drilling down to an image through a financial or report, the download option is not available, this is also not available when clicking on the image option with-in a specific invoice in the AP Module. We are in process of updating each module, and this is functionality that is being considered for all areas to where images are viewed.