Keep folder title and mark all read button at top

I keep 90% of my feeds in folders, so when i scroll through the list of articles I then have to scroll all the way back up to the top just to mark all as read.
So I’m thinking almost like locking the title row in an excel doc - For the folder row with the Mark Read button?
Or indeed as you get to the bottom of the list have the Mark read button again.
At the moment it scrolls off screen