Headnotes appear inside the margin limit (good) and footers appear outside (bad)

https://github.com/musescore/MuseScore/pull/5902

Isn't this exactly the opposite to what has been done for #285361: Footer: add 5mm Y-offset to place within margin?

Although I should note that I was also sceptic about that previous footer placement change. Perhaps it should indeed be applied only to 2.X scores import?

You are right, this is the exact opposite (I hadn't seen that issue). Having the headers inside and the footers outside is inconsistent which is a problem. There should probably be a consensus on which is best, and if such a consensus is not reached, maybe an option to have them either inside or outside?

If we want the behavior to be different only for 2.X scores I can slightly modify the solution and it will most probably work.

#320317: Header (including page number) is placed within printable area of page, allowing collisions requests Header (and Footer) to be outside of the page borders, so basically the opposite of this request here?

I can see that having headers or footers outside the printable area could be bad if you use multiple lines, especially if you only want this on the first page. You'd need to make the margins unnecessary to accommodate them, then waste that space on other pages. So probably it should be s eaprate area added between the margin and printable area only when needed, and sized automatically.

But also - we didn't invent headers and footers :-). Presumably a kind of standard exists for this in other programs and we should do whatever everyone else does.

Came up again on Discord

No more fixes for 3.x

It is part of https://github.com/musescore/MuseScore/pull/9000 though, so you could use the artifacts of that