Configure Multiple Display Mode: registry value DisplayConfigureMultipleDisplayMode (Display)ComputerHKLM\Software\Policies\Microsoft\Windows\Display

Policy ID: DisplayConfigureMultipleDisplayMode
Scope: Computer Configuration
Supported on: At least Windows 11 Version 24H2
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: System › Display

Registry

DefaultTopologySetting

REG_DWORDComputer

HKLM\System\CurrentControlSet\Control\GraphicsDrivers\Configuration

Enabled value: Depends on the option value
Element: Clone, Extend, InternalOnly, ExternalOnly or Continue with default Windows Settings as configuration for Multiple Display Mode.

Options
Item	Stored value
Default	0
Internal Only	1
External Only	2
Clone	3
Extend	4

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\GraphicsDrivers\Configuration]

; Options (use only one)
; Default
"DefaultTopologySetting"=dword:00000000
; Internal Only
"DefaultTopologySetting"=dword:00000001
; External Only
"DefaultTopologySetting"=dword:00000002
; Clone
"DefaultTopologySetting"=dword:00000003
; Extend
"DefaultTopologySetting"=dword:00000004

CMD

:: Options (use only one)

:: Default
reg add "HKLM\System\CurrentControlSet\Control\GraphicsDrivers\Configuration" /v "DefaultTopologySetting" /t REG_DWORD /d 0 /f
:: Internal Only
reg add "HKLM\System\CurrentControlSet\Control\GraphicsDrivers\Configuration" /v "DefaultTopologySetting" /t REG_DWORD /d 1 /f
:: External Only
reg add "HKLM\System\CurrentControlSet\Control\GraphicsDrivers\Configuration" /v "DefaultTopologySetting" /t REG_DWORD /d 2 /f
:: Clone
reg add "HKLM\System\CurrentControlSet\Control\GraphicsDrivers\Configuration" /v "DefaultTopologySetting" /t REG_DWORD /d 3 /f
:: Extend
reg add "HKLM\System\CurrentControlSet\Control\GraphicsDrivers\Configuration" /v "DefaultTopologySetting" /t REG_DWORD /d 4 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\System\CurrentControlSet\Control\GraphicsDrivers\Configuration' -Force | Out-Null

# Options (use only one)
# Default
New-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\GraphicsDrivers\Configuration' -Name 'DefaultTopologySetting' -PropertyType DWord -Value 0 -Force | Out-Null
# Internal Only
New-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\GraphicsDrivers\Configuration' -Name 'DefaultTopologySetting' -PropertyType DWord -Value 1 -Force | Out-Null
# External Only
New-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\GraphicsDrivers\Configuration' -Name 'DefaultTopologySetting' -PropertyType DWord -Value 2 -Force | Out-Null
# Clone
New-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\GraphicsDrivers\Configuration' -Name 'DefaultTopologySetting' -PropertyType DWord -Value 3 -Force | Out-Null
# Extend
New-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\GraphicsDrivers\Configuration' -Name 'DefaultTopologySetting' -PropertyType DWord -Value 4 -Force | Out-Null