Hi, All
If you want to change the non-responsive size 970px, you can do it. Just open this file "../t3 / source / plg_system_t3 / includes / core / template.php" and find this code as below then you can change the size as you want.
if (!$responsive) {
$this->addCss('non-responsive'); //no responsive
$nonrespwidth = $this->getParam('non_responsive_width', '970px');
if(preg_match('/^(-?\d*\.?\d+)(px|%|em|rem|pc|ex|in|deg|s|ms|pt|cm|mm|rad|grad|turn)?/', $nonrespwidth, $match)){
$nonrespwidth = $match[1] . (!empty($match[2]) ? $match[2] : 'px');
}
$this->addStyleDeclaration('.container {width: ' . $nonrespwidth . ' !important;}');
}
Kindest Regards