Hello,
when I use the Cornerstone page builder and I want to insert an image element, I can only select the original size of an image. However, very often I only want to insert a smaller version of the image, which is always generated automatically by WordPress.
When I use the “normal” media selector, which appears when I use the normal page editor, without Cornerstone, I can select the size in the lower right corner:

When using Cornerstone and inserting either an Image element or Classic Image element, I don’t get this option. It’s just missing there:

Is there a way, to select smaller thumbnail sizes of images within the Cornerstone page builder, just like in the normal editor?