Windows 10: [Dual Monitor] How to fix on-screen object scaling?

I have 2x 27" LG monitors:4K UHD LCD2K QHD OLEDI use the OLED for gaming, but I use both for productivity and general use.They are side by side, equal in size, and only different in pixel density / resolution.However, Windows doesn't seem to have any awareness of these differences, and I constantly run into issues like:A window open on Screen 1 will look normal, but after dragging it to Screen 2 various element's of the window's UI will shrink or overlap or deform.Windows that were open previously on the other screen sometimes open in this deformed state.Question: How can I fix this issue so t

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Dual-monitor scaling

Hi, everyone.

I have a laptop+external monitor setup. I use 125% scaling for laptop display and 100% for external monitor.

The problem is when I unplug monitor from laptop and later connect it, scaling factor for external monitor resets to laptop display value. So, every time I have to change scaling value manually.

I guess the issue caused by custom scaling. But I can't turn it off permanently. I have to turn it off and re-sign in every session.

So, summing up:

1. How to turn off custom scaling permanently?

2. How to fix scaling factor for external monitor?

 

Dual monitors with different DPI settings do not give correct scaling

An issue with DPI scaling arises when using two different scaling factors. The screen with the lower DPI display is fuzzy/blurred (most easily seen in text).

Hardware and settings

These are the hardware and settings involved:

• 1x primary 3840x2160 27" monitor with DPI scaling set to 150% (because regular text is unreadable at 27").
• 1x secondary 1920x1080 24" monitor with DPI scaling set to 100%, displaying blurry text and images at these settings.

Workarounds

When I use the same DPI scaling on both monitors the display shows correctly. This gives two undesirable workarounds:

• Setting 100% DPI scale on the UHD screen fixes display, but makes text unreadably small on this monitor.
• Setting 150% DPI scale on the HD screen fixes display, but makes text so large I barely have any screen space left on this monitor.

Is there per chance a better solution to this problem? Is this a Windows bug or am I using DPI scaling in the wrong way?

EDIT: Here's the system info from dxdiag just in case.

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System Information

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Time of this report: 11/14/2015, 13:09:59

Machine name: -

Operating System: Windows 10 Pro 64-bit (10.0, Build 10240) (10240.th1_st1.151104-1714)

Language: Dutch (Regional Setting: Dutch)

System Manufacturer: To Be Filled By O.E.M.

System Model: To Be Filled By O.E.M.

BIOS: BIOS Date: 07/09/14 21:30:44 Ver: 04.06.05

Processor: Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz (8 CPUs), ~3.5GHz

Memory: 8192MB RAM

Available OS Memory: 8112MB RAM

Page File: 5936MB used, 3454MB available

Windows Dir: C:\WINDOWS

DirectX Version: 12

DX Setup Parameters: Not found

User DPI Setting: Using System DPI

System DPI Setting: 144 DPI (150 percent)

DWM DPI Scaling: Enabled

Miracast: Available, with HDCP

Microsoft Graphics Hybrid: Not Supported

DxDiag Version: 10.00.10240.16384 64bit Unicode

 

Taskbar displaying in an incorrect position when using scaling on a dual monitor setup

Hi Jav,

Thank you for posting in Microsoft Community and being a part of Windows 10.

I understand the inconvenience you are facing in accessing the display on dual monitor. Do not worry will help you with this issue.

Do let us know the make and model of your device?

This issue might have occurred due to display drivers. Try the below troubleshooting steps and check if it helps.

Step 1: I suggest you to update the display drivers and check if the issue persists.

Steps to Update Graphics Driver.

• Press Windows key + X key when you are at desktop.
• Select Device Manager.
• Expand Display Adapter.
• Right click on the Display Adapter and click on
  Update driver software.

Step 2: I suggest you to install all the pending updates on Windows 10.

• Connect to the internet.
• Press Windows key and type
  updates.
• Click on Check for updates.
• Under Windows Updates, click on
  Check for updates.
• Try to install the updates being shown.

Also, check if the issue persists on 100% screen resolution as well.

Hope it helps. Get back to us with an updated status of this issue for further assistance.