If anyone want to play Citra emulator in fullscreen here is utility:
https://www.reddit.com/r/emulation/comments/60fn07/citra_fullscreen_utility/
And if someone want to play with pad Xpadder is best option so far
most useless thing ever. the eternal problem is still there: YOU HAVE TO MANUALLY SWAP BETWEEN SCREENS.
all/most of the games on 3ds that are worth playing utilize the 2nd screen for something real, and thus it is required to have both screens side-by-side when playing the game.
these games that people "show off" running in citra in "fullscreen" are almost always just ports of games that were originally from a single-screen non-hand-held console(s), and/or a simplistic game that doesn't require the 2nd screen of the 3ds/citra.
what the fans REALLY want is for the currently best/fastest builds to actually support custom window layouts!!!!! i.e. the JIT and SSE/AVX+JIT optmized builds, which are currently lightning fast but only allow default screen layout.
the mingw/msvc/bleeding edge/nightly/gcc/gccku builds however, i.e. the builds that usually say "dirty" in the title bar of the main citra window; these builds are not as fast but allow custom layouts.
now, if you somehow have a way to have CITRA render TWO SEPERATE WINDOWS IN A SINGLE MONITOR... then we're talking!
then one can have two windows "side-by-side" without needing to mess about with layouts, and both running the same ROM and both windows drawn from same parent application.
now THAT would be some awesome improvement.
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If anyone want to play Citra emulator in fullscreen here is utility:
https://www.reddit.com/r/emulation/comments/60fn07/citra_fullscreen_utility/
And if someone want to play with pad Xpadder is best option so far
i recently upgraded to cheap intel core i3-7100 socket lga (120 usd) and cheap zotac geforce gt 1050 GPU (115 usd) and this is now enough for ANY citra build to run ANY 3ds game I've tested at either 100% speeds, or 85-90% speeds when a bunch of stuff happens at once.
and if i use one of the super-fast builds, like the feb 8th JIT build, i get (with frame rate unlocked) hundreds of frames per second in the most currently demanding CITRA games like dragon quest 7 and 8.
i type this in hopes that it will help you out in terms of making a decision. i only spent 250 usd on those two parts (plus a 50 usd motherboard), 300 in total, and all previous CITRA problems are now a thing of the past.
not to mention of course machine is much more capable now for all other stuff. I do however think you definitely SHOULD NOT go any cheaper than the intel core i3... anything cheaper/lower performance than that cpu and you won't be able to enjoy CITRA emulation.