How do I get rid of the white border gThumb places around thumbnails?

gThumb puts a white border around all thumbnails in the browser and full view images in the viewer. This white border does not allow users to see if an image actually has white on the edges the image. How can I set gThumb so it does not show a white border around thumbnails and full view images?

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.