First & foremost, it applies to external screens. Unless you tinker with resolutions manually, games don't get scaled on the internal screen.

The 3 scaling modes are pixel, linear & "sharp" which is FSR. Selecting the latter gives you another slider which you can play around to get what looks best for you. I think, I'm going with 2.

Linear looks, I think, decent for 2D games with a drawn style direction. Pixel scaling works for 2D pixel art games. You can set this stuff on a per-game basis as well.

What you also can do is to forego scaling entirely and have SteamOS launch that game at the native screen resolution. No scaling. Me & my GF play HOGs on the TV this way.

引用自 kznikikit15：

Hello, I've scoured the internet but haven't found an answer to my question. I'm really curious about how to properly use the built-in scaling mode on Steam Deck. I'd be very grateful if you could enlighten me!

- Steam Deck Sub-forum:

https://psteamcommunity.yuanyoumao.com/app/1675200/discussions/

Thank you so much, I really appreciate the feedback! I'm glad you're able to play together! I was just wondering if scaling makes sense for 3D games like No Man's Sky?