How to only review a page of 15 items, then mark remaining items of the page as read ?

Imagine a high-traffic feed where you typically only read every 5th entry or so. Yet, you review all headlines and then mark them as read. Now imagine that you don’t do this for a couple of days. Try playing catch-up now.

Google Reader with its mobile web interface was paging the feeds - showing 15 entries per page. I had always reviewed the high-traffic feed like this, and clicking the “mark as read” button would mark only those items on that page, and then bring up the next page of 15 unread …

How can I do the same with Newsblur - either on the web or on iOS ? Many thanks in advance & greetings from Barcelona, Spain.