Tell us what you are trying to do?
I have looked through numerous posts and can't find any way to affect the order that the relationships show up in my custom post type. I'm not talking about the common problem of sorting content within the relationship, but rather the relationships themselves. For example, I have a one-to-many link for posts allowing my "section" custom post type to have multiple posts in it. I have a pages relationship for the same thing with pages. But I have a one-to-one relationship for Cover Pages. These are unique single pages that will be displayed at the beginning of my section output. Right now, when I create a new Section post, it asks for Section-Posts, Section-Pages, then Section-CoverPage. I would pref that it asked for Section-CoverPage first, then Pages, then Posts. Is this possible? What order are the relationship fields displayed in? If I delete all my relationships and add them back in the order I want them, will this change the order they are asked in a new Section CPT?
What is the link to your site?
Just starting this site and trying out relationships so there's nothing up to look at yet.
What would be nice is if the dashboard for relationships allowed you to order them the way that Pages can be ordered by drag and drop.
WordPress metaboxes are designed to be managed on a per-user basis, so any user can according to their preferences drag and drop the metaboxes into their preferred order, close ones they are not interested in seeing normally, etc., so that every user may see something different according to their needs.
So you could simply re-order the metaboxes for the relationships when editing a post and it would be reflected on all such posts, but only for you.
I'm guessing you want a different experience, namely that all users see the same—particular—order.
You would need to use a somewhat obscure WordPress filter for this, where you can modify the order and apply it to all users.
I dumped the $order attribute to my logs for an idea of what to expect, and found the metaboxes for my two relationships applied to the post type in question in the advanced section (for project-tasks and project-posts), e.g.