Middle monitor showing left monitor when DCS focused

[Veen]

have a fresh install of Windows and DCS, 3 screens.

The main issue I've got is that whenever I have DCS in focus the middle monitor switches to the image of the left monitor.
I've googled around some and removed the saved games folder and the Temp\DCS folder.
Did a repair/check on the file.

Kinda lost on what to do after all that. Anyone got a clue what the issue could be there?

I've attached the dcs log and DxDiag file in case they are useful.

dcs.log DxDiag.txt

[Leg2ion]

Hi @Veen. What is your PC monitor setup, and what is your monitor setup file showing (not sure what 'DCS in focus in middle monitor' means?). Ideally you need to align your monitors in your PC, then transfer those settings to your monitor setup and in game settings.

 

This is a really good guide albeit the end result is to export MFDs - but gives a really good basic setup:

 

[Veen]

Hi Leg2ion

I have 3 1440p monitors side by side
So one left one middle and one right
I am using the unmodified 3Cameras monitor setup file which used to work until it didn't ^^'

It's really weird.
And it just gets weirder the more I look at things

Here's what it should look like / How it looks when I alt tab out of the game

Here's what I see when focused on the game

 

And here's a screenshot from windows when tabbed out of game

Third one is news to me
I see the left monitors image displayed on middle monitor while a screenshot just shows black

 

[Leg2ion]

Which Monitor is your 'main' in windows? 

[silverdevil]

On 10/18/2025 at 9:49 AM, Veen said:

3 screens

get the resolution width of each monitor. in DCS you are basically making one very wide monitor. then you have to modify an LUA with the appropriate parameters.

this forum may have your answer.

https://forum.dcs.world/forum/999-multi-display-support/

i have one monitor so i cannot share my file with you. say i have 3 exact monitors 3440x1440. 3440x3 (10320) would be my number. 

[MAXsenna]

If you don't feel comfortable editing the file yourself. Helios is an option to help you easily build it, even if you don't plan on exporting anything.

Sent from my SM-A536B using Tapatalk

[jonsky7]

On 10/18/2025 at 2:49 PM, Veen said:

have a fresh install of Windows and DCS, 3 screens.

The main issue I've got is that whenever I have DCS in focus the middle monitor switches to the image of the left monitor.
I've googled around some and removed the saved games folder and the Temp\DCS folder.
Did a repair/check on the file.

Kinda lost on what to do after all that. Anyone got a clue what the issue could be there?

I've attached the dcs log and DxDiag file in case they are useful.

dcs.log 42.27 kB · 3 downloads DxDiag.txt 104.42 kB · 2 downloads

You have two options when running 3 monitors

You can either:

1. Use all 3 monitors to effectively make one large wide display. All 3 screens will show a forward facing view which equates to a large Field of Vision (FoV)
or
2. Have a 90deg Left view, a Centre View, and a 90deg Right view.

I am assuming from your pictures, that your centre monitor is your "WINDOWS MAIN DISPLAY" and the left and right monitors are set to "EXTEND DESKTOP TO THIS DISPLAY", these are set in the Windows display settings.

You now have to make another choice, do you wish to keep the centre monitor as your main display, or could you live with the LEFT monitor being your main display.
The simplest method of getting DCS to do either option 1 or 2 is to set your "MAIN DISPLAY" as the left monitor.
Then
Option 1 - Select "1Camera" in the DCS settings and set your resolution as 7680x1440
Option 2 - Select "3Cameras" in the DCS settings and set your resolution as 7680x1440


If you want to keep your centre monitor as your MAIN DISPLAY then;

Option 1 - Use this monitor config file Veen-3 screen-1 Camera.lua  , in the DCS settings and set your resolution as 7680x1440 

Option 2 - Use this monitor config file Veen-3 screen-3 Cameras.lua  , in the DCS settings and set your resolution as 7680x1440

Save the files in SAVED GAMES > DCS WORLD > CONFIG > Monitorsetup


For 3 screens x 3 Cameras, you can alter the left and right view by adjusting the values of  "viewDx" where 0 is straight ahead, a value of -1 is left 90Deg, and 1 is right 90Deg.
So 45 degrees, or a forward-left view would be -0.5, but it doesn't work very well as a FWD-LEFT view duplicates parts of the cockpit, there is no way currently that I know of to align it.

Edited 7 hours ago by jonsky7