it works like this (currently)
up/down - move between articles
shift + up/down - scroll either article buffer OR headlines up, depending on combined mode or not
pgup/pgdown - same as above but scroll entire pages
i think i’ll add shift prefix to default pgup/pgdown bindings for consistency because up/down hotkey handler doesn’t change behavior depending on two/three panel mode.
also, i think there’s room for a hotkey which should always scroll headline buffer, i.e. moving between articles/headlines like up/down but entire pages. this could bind to pgup/pgdown by default because it would work similar to up/down.