Add A Custom Size
Code
Filename: gpml-add-a-custom-size.php
<?php
/**
* Gravity Perks // Media Library // Add A Custom Size
* https://gravitywiz.com/documentation/gravity-forms-media-library/
*/
add_filter( 'gpml_merge_tag_image_sizes', function( $sizes ) {
return array( 'image_one', 'image_two' );
} );