Sorry if this was asked before. I am new to this whole business of widescreen (16/9). I have video clips in 4:3, and would like to convert them into widescreen without resizing/stretching the clips of course. What I need is to have a letter box at top and bottom. I keep on getting the clip inside a black box. How can I instruct vegas video to only show the clip in a letterbox (black on top and bottom)?