To add custom class name to the class attribute of the Read More button, please add this code to file functions.php in the directory of your active theme:
// Content Views Pro - Add custom class name to the class attribute of the Read More button
add_filter( 'pt_cv_field_content_readmore_class', 'cvp_theme_field_content_readmore_class', 100, 2 );
function cvp_theme_field_content_readmore_class( $class, $fargs ) {
$class .= ' ' . 'YOUR_CLASS_HERE';
return $class;
}
(replace YOUR_CLASS_HERE with your class names)
Best regards,