How to remove the white border ?

[Sly Crespo]

I want the border around the pictures to be black not white. See picture. How can I do this ?
Thanks.

[razaro]

Look at following topic
http://www.prestashop.com/forums/viewthread/24697/integration/how_to_make_image_background_transparent

Then try to change in images.inc.php in root

   $black = imagecolorallocate($destImage, 0, 0, 0);
   imagefill($destImage, 0, 0, $black); 
   imagecopyresampled($newImage, $imageGd, 0, 0, 0, 0, $ratioX, $size, $x, $y);
   imagecolortransparent($newImage, $black);

And add same image again as cover image and delete old one or try regenerate images from
Back Office >> Preferences >> Image