Uploader Type

Choose which uploader type should be used in the post edit screen, the setting is field based.

Setting nameDescription
Uploader typeChoose the uploader type

See Featured Images & Post Thumbnails documentation.

This setting will automatically set the image as Featured thumbnail on the current post. This setting will only work on Post objects (and not on terms, options or users). Note that add_theme_support('post-thumbnails') must be activated.

Setting nameDescription
Featured thumbnailMake this image the featured thumbnail

This setting will save the selected image in the _thumbnail_id meta key. The field’s value will also be saved like any other ACF field. To prevent the value from being saved, you can use the acf/update_value hook and return null. Usage example:

/*
 * https://www.advancedcustomfields.com/resources/acf-update_value/
 */
add_filter('acf/update_value/name=image', 'my_acf_image_update', 10, 3);
function my_acf_image_update($value, $post_id, $field){
    
    return null;
    
}