Hulldo teaches you how to give your images a widescreen border using GIMP. Open up a picture and the click new layer. Next go to select - border and make it 3 pixels. Go to tool options and use black for foreground fill. Select none and create a new layer. Go to view and make sure snap to canvas edges is ticked. Go to rectangle select tool and go to its menu. Then select 640x30 pixels. Fill that layer with black and select none. Duplicate this layer. You place this one on the bottom and you are done with widescreen border.
Start your career in Graphic Design with the WonderHowTo's Beginners’s Guide to Photoshop Course