Попробуйте так:
[CODE]$arWaterMark = Array(
array(
"name" => "watermark",
"position" => "center",
"type" => "image",
"size" => "real",
"file" => $_SERVER["DOCUMENT_ROOT"]."/upload/i/copy.png",
"fill" => "exact",
)
);
if (is_array($arResult['MORE_PHOTO']) && count($arResult['MORE_PHOTO']) > 0) {
unset($arResult['DISPLAY_PROPERTIES']['MORE_PHOTO']);
foreach ($arResult['MORE_PHOTO'] as $key => $arFile) {
$arResizeFile = CFile::ResizeImageGet(
$arFile["ID"],
array("width" => 80, 'height' => 80),
BX_RESIZE_IMAGE_PROPORTIONAL,
true,
$arWaterMark
);
$arResult['MORE_PHOTO'][$key] = $arResizeFile;
}
}
[/CODE]
А вообще вот документация по функции [url]http://dev.1c-bitrix.ru/api_help/main/reference/cfile/resizeimageget.php[/url]