Hi, I've just started using Sony Vegas Pro today (the free trial version of Vegas Pro 14.0) and am trying to erase the background from a clip, but it's not working. I know I successfully cut out/outlined the section I want to keep because the background has gone darker in the Pan/Crop window. I've ticked the Mask box in the bottom left corner of Pan/Crop, but when I play the video in the main Preview window the background is still showing. Do you know what I can do to get rid of it? Or is masking not available in the trial version of Sony Vegas? Any help is much appreciated :)