It would be great if the Link Properties window contained a sub section which enabled all of the features relevant to an image link to be set within that window, such as the background image, top, bottom,left, right padding around the link, a hover image plus down status image and visited image would ideally all be capable of being specified, covering all of the commonly used css properties associated with image links.
Possibly these features could be displayed in an expandable area of the Link Properties window by clicking a relevant icon located in the window.