Show read items only
Along the "Show new" selector it would be useful to have a "Show read" choice with which only those items are shown which are already read.
Raitonale: one might wants to go back to a post that has been read before, or recollect what was read recently. That's really hard with busy feeds where the read ones are like a few percentage of all items.
I would like a recently read section as well. Sometimes I start reading an article somewhere and have to stop because of other duties and inevitably can't find it again. This option would solve that.
I'm not yet sure about this feature. I'm planning to implement "Recently read" section which could partially help there. And you may select "Show all" and select list view mode -- that way you could find read items more or less quickly.