When messing around with the in-game resolution I came across a problem when I set the game resolution to 4k on my 1080p monitor. The game only displayed a 1920 x 1080 segment of the game so it has effectively zoomed in to the centre of the screen, where the options menu was cut of the edge of the screen so I could not set the game back to 1080p. I tried manually deleting the user settings files in a hope it would reset to default settings but it did not work. I eventually found out how to manually change the resolution so I thought I should write a guide to help anyone else who comes across this problem.

First of you need to find your settings folder. It should be located somewhere like:
C:\Users\NAME\Documents\The Witcher 3

You should be able to see a document called "user.settings"

Right Click on it and click open with. Then choose open with notepad.


Now you should see a bunch of text with all different settings. Scroll down until you see one called Resolution="3840x2160". Change the values to whatever you want the game to run in.

For 1080p put "1920x1080"
For 720p put "1280×720"
Etc etc you understand

Now just save and reopen the game and it should run in the resolution you chose.

I hope this Guide helped anyone who had the same problem I had :D