Hi,
you can enable
Paging in Properties of repeater webpart and set
Page size to 1. This way only one article item with Next, Prev button will be displayed.
Unfortunately, adding navigation buttons into detail is not natively supported. You could eventually use repeater with
custom query and specify query so it acquire actual document and also previous and next document (you can use NodeOrder field to recognize next and previous items) and use information (NodeGUID) from previous/next document to
generate the link to it.
Best regards,
Ivana Tomanickova