On a page back-end, I have a relationship that users can select CPT’s.
On the page front-end, it shows all the posts selected and you can click through to the single.
On the single, I want to show which pages have selected “this” post from the relationship.
Is this possible or have I over thought it?
Can you clarify what you want on the single page exactly?
Do you want to see links to the other posts that are in the same Relationship field as the single post your viewing?
