Why doesn't the Zoom feature work on a picture or clip? It will pull up the window where I set the parameters for how far I want the picture zoomed in to, but when I close out of that window, it's had no effect on the clip. It looks fine when I preview it. There's no button I've found that I have to click to ask it to apply. And this is the only effect I've had this problem with. Is it just a bug?