`sudo paperconfig -p a4`
does that *and* sets default paper size in systems that depend on it. That seems to be limited to TeXLive on my system, none of the graphical apps
@arivigo it's easy to miss.
Enjoy your proper-sized paper. I moved from an A4 country to an "officially sorta A4 but everyone uses letter because of our weird shouty neighbours downstairs" country. I miss being able to scale designs properly
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