How to Open Subnautica in Windowed Mode
Another way is to go to your Steam library, right-click on Subnautica, select Properties, and in the Launch Options, type `-windowed` to force it into windowed mode when you start the game.
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Hey there! To open Subnautica in windowed mode, simply go to the main menu, then to Options > Graphics, and select Windowed from the Display Mode dropdown.
Alt+Enter is a classic combo that can switch the game to windowed mode. Worked like magic for me!
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