What about to make the page fill 15 30 45 60 messages
15 is to small and we cant mark or unmarked messages

Checking for posts of goodbyes, I found this. And I must say, I simply can't believe it was even suggested. The fact that it was just baffles me, seriously. The pages were implemented to prevent scrolling, and making them bigger requires scrolling. See what I mean? As to marking, I think all messages are equally important enough that they can be deleted at once. If you want to save one, put it in a note.

Pointless, its fine as it is.