Whoops, not exactly what I had in mind.
If I go to "View all new posts", once I leave the site all those posts are treated as read. whether I have actually read them or not.
It would be nice to look at a couple, leave the site and then go back again without the new posts being only those made between my visits. Am I making sense? if so it will be a first 😆
They have a very good system on the flyer forums, i.e. new posts are cleared manually when the reader determines, not automatically at the end of each visit.