"ultimate_responsive", "class" => "", "heading" => __("Font size", 'ultimate_vc'), "param_name" => "YOUR_PARAM_NAME_FONT_SIZE", "unit" => "px", // use '%' or 'px' "media" => array( // "Large Screen" => '', "Desktop" => '28', // Here '28' is default value set for 'Desktop' "Tablet" => '', "Tablet Portrait" => '', "Mobile Landscape" => '', "Mobile" => '', ), "group" => "Typography" ), # Module implementation - 1] Create Data List - $args = array( 'target' => '#ID .TARGET_element_CLASS, #ID #TARGET_element_ID', // set targeted element e.g. unique class/id etc. 'media_sizes' => array( font-size' => $YOUR_PARAM_NAME_FONT_SIZE, // Your PARAM_NAME which you set in array 'line-height' => $YOUR_PARAM_NAME_LINE_HEIGHT // Your PARAM_NAME which you set in array ), ); $data_list = get_ultimate_vc_responsive_media_css($args); 2] Add ID and class 'ult-responsive' and set data attribute - $data_list to targeted element