In Final Cut Express, how do you change the Canvas (if that's the right word? The bit where you preview your sequence, anyway) aspect ratio to match that of the videos? I've been editing 16:9 footage but when I export it comes out with black bars as 4:3 because the canvas is set to 4:3... which means that front row and various others can't display the video in true widescreen (without the black bars) on my iMac's display, or the people I distribute the video to. Does anyone know how to change this? All help appreciated.