If you’re wondering how to play certain titles in 4K (ultra HD) with your smaller monitor or how to setup bigger resolutions for HQ screenshots you need three (100% free) tools, respectively called Windowed Borderless Gaming, SRWE (Simple Runtime Window Editor) and GeDoSaTo.
How do they work?
For WBG you only need to open it and wait until a new tray icon appears on the bottom, then right-click on it and select Add window (F3). Assuming you already have a running game in the background press the F3 key once you’re in it and a confirmation message will appear. Right-click again and select Settings > Game settings, if your game is displayed correctly type your custom resolution and click Apply (you may need to do so twice to successfully see your image bigger and with no quality loss). Take your screenshot and go back to your native resolution if you want to play normally again.
For SWRE the process is more or less the same. Launch the program and click on Select running Application to open the game from the list, then add your own resolution in the position and size section. This time the game should automatically change its window size.
You can find a list of currently supported games here.
GeDoSaTo is a bit more complicated since it requires a completely different setup. This tool however is not only useful to take bigger pictures, you can in fact play with a higher resolution during gameplay and cutscenes as well without changing the window size. If your computer is powerful enough you shouldn’t get any performance drop, I tried it with my laptop and sadly the bigger my resolution is the slower it gets. It also depends on the game you’re running and the amount of shaders and effects included in it.
1) Download the program.
2) Open it and click on Edit Settings.
3) You will see a long test with codes and keybindings, that main configuration is a needed reference and you can copy the whole thing into your game settings or even remove what you don’t need.
4) It’s highly recommended to create a copy of that file (GeDoSaTo.ini) in order to fix any issue in case your custom settings do not work properly. To do so copy the entire text and click on the U button next to Profile.
5) Paste everything in your new file, then save.
6) See if the game you want to downsample is included in the list. If so it should already have some default settings applied, but they are very limited and need more stuff. You can paste the previously copied text in there as well, picking your favorite resolutions and avoiding what you don’t want.
7) Once you’re done simply minimize the program and launch the game, you should now see the custom resolutions in the video settings which were not there before. Pick the one you want, save and exit.
8) Load the game one more time. If everything works as it should you may see a white text on the top where GeDoSaTo informs you it is downsampling, using your native resolution for the calculation.
Note: GeDoSaTo only works in fullscreen!
If for some reason you can’t get it to work even if it’s perfectly functioning in the background (and activated), try opening both Sato and the game with administrator rights.
Now, if you simply want to know how to extend your game on two or three monitors you can actually do it using the Nvidia Surround configuration (one of the latest GTX cards is probably needed though).
This is how it works:
Again, it looks like only certain games are supported.
If the game you want to play and/or shoot from is not compatible with any of the tools listed above, you could use Nvidia DSR and create custom resolutions based on your aspect ratio.