I would like to change the testimonials image size, as it to small for my desing. I have found that in the theme, into the folder /wp-content/themes/royal/framework/testimonials and file woothemes-testimonials-template.php there is a variable called $img_size, with value 40. If I change it to 200, the image for the theme change to that new size.
But I suppouse that if I update the theme, this file will be overwitten and I will loose that change. How can I move that to the child theme in order not to loose it? Or maybe i dind’t found it, is there any parameter to overwrite it by theme settings?