Windows 10: Making dual external monitors extend across each other

Just migrated from a Windows 10 to a Windows 11 Surface pro 9. Have two external monitors on a dock. Settuings/Devices sees the three monitors, will let me duplicate monitors 2 and 3, but will not let me extend across 2 and 3??

:)

 

External monitors extending issue.

I am trying to connect 6 external monitors to my laptop running on windows 10. I am using DVI-D dual-link to HDMI cable to connect the monitors to the HDMI splitter and HDMI to HDMI cable to connect the splitter to the laptop. There
is just one problem when I am extending the screens, the external monitors seem to duplicate themselves rather than extend. So instead of 1 to 7 for all monitors combined, all my laptop only detects 1 and 2. 1 being my laptop and 2 being all the other external
6 monitors. That means that all the external monitors showing me the same thing as in they duplicate and not extend. Any suggestion on it can be fixed so all the external monitors become the extension of my main laptop and do not duplicate?

 

Extend Display to second and third monitors

Hi Ian,



Thank you for writing to Microsoft Community Forums.



I appreciate the efforts taken by you in resolving the issue. I understand that you are unable to extend the display to second or third monitor. I’ll certainly assist you with the issue.



However, it would be great if you can help us with the details requested below:

• What happens when you try to extend the display?
  
• Do you receive any error message/code?
  
• Are you aware of any changes made to the computer recently?
  
• Which build version of Windows 10 is installed on the computer? To check type:
  winver in the search bar on the Taskbar and hit
  Enter.
  
• What is the make and model of the laptop?
  

Ideally, to extend the display we can use the shortcut Windows logo key + P, and select
Extend from the menu.



I would suggest you to refer the troubleshooting steps mentioned in the article

Troubleshoot external monitor connections in Windows 10 and see if that helps.



For additional information, see
Set up dual monitors on Windows 10.



Let us know the results.



Regards,

Nikhar Khare

Microsoft Community - Moderator

 

How to make external monitor as primary monitor?

Hi,

Thank you for writing to Microsoft Community Forums.

We understand that you want to make the external monitor connected to the laptop as a primary display and do not want to mirror the laptop display.

We would suggest you to refer the steps mentioned below:

1. Press Windows key + P, and select
   Extend.
   
2. Now, press Windows key + I, to open
   Settings.
   
3. Click on System, and select
   Display on the left pane.
   
4. Now, under Rearrange your displays, click on Identify to
   Identify the displays.
   
5. Click on the display number that is for external monitor.
   
6. Scroll down, and click on the checkbox for
   Make this my main display.
   

Refer the screenshots below:

Identify and select Display:





Select Primary display:





For additional information, see
Set up dual monitors on Windows 10.

Let us know how it goes.

Regards,

Nikhar Khare

Microsoft Community - Moderator