hi patawat, you might want to update an already uploaded image to the wiki rather than uploading a new image. there is an option “upload new version of this image”. see File:Tshirt black.jpg
--max 17:34, 27 June 2011 (CEST)
please make use of the preview button, this keeps the version history clear. --max 14:37, 29 June 2011 (CEST)