https://sir.kr/qa/291744

if ($mark == 1){
function waterMark($fileInHD, $wmFile, $transparency = 65, $jpegQuality = 90, $margin = 5) {
 $wmImg  = imageCreateFromGIF($wmFile);
 $jpegImg = imageCreateFromJPEG($fileInHD);
$wmX=imageSX($jpegImg) - imageSX($wmImg);
$wmY=imageSY($jpegImg) - imageSY($wmImg);
 imageCopyMerge($jpegImg, $wmImg, $wmX, $wmY, 0, 0, imageSX($wmImg), imageSY($wmImg), $transparency);
 ImageJPEG($jpegImg, $fileInHD, $jpegQuality);
}
//##add060613 이미지합성함수

$data_path = $g4[path]."/data/file/$bo_table";
$thumb_path = $data_path.'/thumb';

    $sql=" select * from $g4[board_file_table] where  bo_table = '$bo_table' and wr_id = '$wr_id' order by bf_no asc";
    $results = sql_query($sql);
    for ($i=0; $row=sql_fetch_array($results); $i++)  {
$file = $data_path .'/'. $row[bf_file];

if ($_FILES[bf_file][name][$i]){
waterMark($file,$board_skin_path."/img/logo_mark.gif");  // 요거 추가됨 윈본이미지우측하단에 로고를 붙이자
}

if ($i==0 && $_FILES[bf_file][name][0]){
    if (preg_match("/\.(jp[e]?g|gif|png)$/i", $file))    {
        $size = getimagesize($file);
        if ($size[2] == 1)
            $src = imagecreatefromgif($file);
        else if ($size[2] == 2)
            $src = imagecreatefromjpeg($file);
        else if ($size[2] == 3)
            $src = imagecreatefrompng($file);

        $rate = $board[bo_1] / $size[0];
        $height = (int)($size[1] * $rate);

        @unlink($thumb_path.'/'.$wr_id);
        $dst = imagecreatetruecolor($board[bo_1], $height);
        imagecopyresampled($dst, $src, 0, 0, 0, 0, $board[bo_1], $height, $size[0], $size[1]);
        imagepng($dst, $thumb_path.'/'.$wr_id, $board[bo_2]);
        chmod($thumb_path.'/'.$wr_id, 0606);
}
}
    }}

예전에 어떤분이 만드셔서 잘 사용하고 있는데 

위치가 오른쪽 아래로 고정되어 있네요....

왼쪽 아래나 위쪽에 고정하고 싶은데 소스 수정할 부분이 있나요?