Quick Borders in GIMP
- Set the background color to the desired border color.
- Click Image, Canvas Size.
- Select “pixels” and enter the appropriate size for one dimension. For instance, if you have a 640×480 image and you want to add a 5 pixel border to each side, enter 650 and 490. For a more proportional look, enter 650 and then click the “lock” and the other dimension will be automatically calculated.
- Click the “Center” button.
- Click the “Resize” button.
- Click Layer, Layer to Image Size.
- Voila.
