Hey sorry for the late reply!

You'll need to add your image size to your theme's functions.php. Additionally you'll need to add that size to the "image_size_names_choose" filter.

add_action( 'after_setup_theme', 'add_my_image_sizes' ); function add_my_image_sizes() { add_image_size('mysize', 1000, 1000, false ); } add_filter( 'image_size_names_choose', 'my_custom_sizes' ); function my_custom_sizes( $sizes ) { return array_merge( $sizes, array( 'mysize' => __( 'My Size' ), ) ); }

Then you'll need to regenerate your images using the plugin "Regenerate Thumbnails
".
Now you'll need to re-insert the images you have already inserted in your grids to update the json. A double click on an image and a click on "Ok" in the media library should do it.

Here is a screenshot of my new size "mysize" appearing in the JSON:

Dear @Simon
thank you for the idea.

We will consider that!

Best!

Marius

Dear @runebrink
you can select in the Gridder Settings if you want to hide the old content or not.
I strongly assume that the content will stay, when you hide it and will be accessible afterwards again.

I would anyway recommend to make a backup and also make a small test on a less dangerously website.

Best!

Marius

Ah! We love it! Very nice!!!!