First off, welcome! I would like to state that in the future you should make you questions a bit more detailed.From what I understand you either want to (1) stretch the image to remove the black bars, or to (2) scale the image.Either can be done by dragging the clip on to the timeline and hitting the pan/crop button on the clip (it looks like a box, not the plus sign).From there you will find a window where you can scale the clip according to the aspect ratio. If it does not conform to the 16:9 aspect ratio or the 4:3 ratio you want you can select one of those ratios from the drop down and scale the clip to remove the black bars.
If you want, you can also disable the the current ratio with one of the buttons on the side of the window. From there you can adjust the image freely without an aspect ratio limitation.
Bare in mind, This can cause undesired effects such as squeezing the image in either direction.
Sep 7, 2018 - The easiest way to fix this is to right-click on the pan/crop area and select Match Output Aspect.
In this tutorial, we learn how to find missing windows and panels in Sony Vegas. When you are in Sony Vegas, you will want to look in the middle for several lines that have 'X's' in them.
Now, place the mouse on the side of these and drag out the windows that you see, and you will be able to drag out the panels you have been looking for. After this, change the view of your page so you can always see the panels you need to on this software.
Next your windows will be where the other x's are, and you didn't lose anything! The interface all moves around, so situate everything how you want it to be, then you won't lose any more windows or panels.