How to Enable Full-Resolution Images in Newsletter Glue

Problem

If images added to your newsletter appear smaller than expected, it’s usually because your WordPress site’s default image size is set to Large. Newsletter Glue respects this WordPress setting when inserting Image blocks.

Why This Happens

WordPress allows a default image size to be defined (Thumbnail, Medium, Large, or Full). Newsletter Glue uses this value when adding images to newsletters. If your site is set to Large, images will be inserted at that size instead of full width.

Solution

You can force WordPress to use Full as the default image size by adding the following snippet:

add_filter('option_image_default_size', function(){
    return 'full';
});

add_filter('option_image_default_size', function(){
    return 'full';
});

Where to Add This Code

Add the snippet to one of the following locations:

• Your child theme’s functions.php file
• A trusted code snippets plugin (recommended if you’re not editing theme files)

Important Notes

• This change only affects newly added blocks in Newsletter Glue.
• Existing blocks will not be updated retroactively. You’ll need to reinsert those images if you want them to use the full size.

Need Help?

If you’re unsure where to place the snippet or have questions about image sizing in Newsletter Glue, feel free to reach out to support—we’re happy to help.