It's cumbersome to zoom in and out of a photograph on the WebUI. Our users review many photographs and have to zoom in and out on images over and over. If they want to zoom in on a specific section, particularly a corner, they have to click the zoom button, then click the image hand grabber to re-center it over the location they want to zoom in on, then zoom, then recenter, then zoom. It's quite cumbersome. I don't know what's technically possible, but ideally the scroll wheel would zoom in and out on a photo when you are highlighted on it. Or you could use Shift + Scroll wheel to zoom in and out. Another alternative would be to make the left click button zoom in and have a button, as you do now, for zoom out. Just something to make zooming in and out easier.