If you know what you are doing, you can use the Theme Editor to add this line to your functions.php (do it in your child theme – otherwise when you update your main theme it’ll get overwritten each time)
add_filter( 'big_image_size_threshold', '__return_false' );
That’ll turn off the image scaling introduced in WordPress 5.3.
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This reply was modified 5 years, 4 months ago by mintWP.
