An update to this issue: I’ve discovered if I upload the image from the Media gallery at “full size” into the portfolio, at appears huge. But when I preview the page, it displays the image as “medium” format, i.e. 700 x 1054 (which I want) and the image is actually sharp. Is this a simple solution or are there side affects, i.e. long loading times for viewers to the page given the full file sizes? Thanks in advance to anyone who can shed some light on this topic.