Could be possible to enable a feature to show image link into gallery pop-up? For example, near the "Download this image" link?

Hi,

There is no such feature in Simple Image Gallery PRO but this is something you can do creating a template override. However, i don't get the point since you have the download link.

In any case, if you have an active subscription, create a ticket to our help desk system so we can help you adding the link.