Media Library select images not appearing for 'editor'

Hello

I have a site which I’ve nearly finished building which has just 2 users, me the administrator and and an ‘editor’. I am finding that when logged in as the editor, they can’t select, see or use any images from the media library. The editor can see all the media fine via the ‘Media’ tab, but when editing a post none of these images are available. I guess it is something to do with roles, I’ve tried changing the images and posts ‘author’ to that of the editor, but to no success. Perhaps someone may have an idea as to how I can change it so that they can use all the images.

Many thanks.