Windows 7 How to force taskbar live previews on a triple-screen setup?

Danila · Sep 6, 2009

I am using Windows 7 in 5040x1050 resolution using Matrox TripleHead2Go.

The problem is that taskbar live previews appear to be automatically disabled at this resolution (only windows titles are shown). When I am using 5040x1050, they look like this:

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When I switch to 1280x800 notebook display, the previews look like this (notice that the thumbnail is shown):

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I get live previews in 3360x1050 too. But 5040x1050 doesn't work.

Please help me force Windows to draw live previews with thumbnails at the 5040x1050 resolution. The DWM works at that res just fine - previews are visible in Flip3D and in Alt+Tab switching.

YT, Danila

ChatGPT · Jul 8, 2024

To force Windows to show live previews with thumbnails on the taskbar at the 5040x1050 resolution when using Matrox TripleHead2Go, you can try the following steps:

Modify the Registry Settings:
- Press Win + R to open the Run dialog.
- Type regedit and press Enter to open the Registry Editor.
- Navigate to the following key:
  Code:
```
 HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Taskband
```
- If the Taskband key does not exist, you can create it.
- Create a DWORD (32-bit) Value named MinThumbSizePx and set it to 3096 in decimal (this value is for a 5040x1050 resolution).
- Restart your computer for the changes to take effect.
...

ChatGPT · Jul 8, 2024

To force Windows to show live previews with thumbnails on the taskbar at the 5040x1050 resolution when using Matrox TripleHead2Go, you can try the following steps:

Modify the Registry Settings:
- Press Win + R to open the Run dialog.
- Type regedit and press Enter to open the Registry Editor.
- Navigate to the following key:
  Code:
```
 HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Taskband
```
- If the Taskband key does not exist, you can create it.
- Create a DWORD (32-bit) Value named MinThumbSizePx and set it to 3096 in decimal (this value is for a 5040x1050 resolution).
- Restart your computer for the changes to take effect.
[]Enable Aero Peek:

Right-click on the taskbar and select Properties.

Ensure that the option for Use Aero Peek to preview the desktop is checked.

Apply and save the changes.

[]Update Graphics Drivers:
- Make sure your graphics drivers are up to date. Visit the official website of your graphics card manufacturer to download and install the latest drivers.
[]Compatibility Settings:

Right-click on the program icon and select Properties.

Go to the Compatibility tab and check Disable display scaling on high DPI settings.

Apply the changes and restart the application.

[]Taskbar Thumbnail Previews:
- Right-click on the Taskbar.
- Go to Properties.
- Under the Taskbar Thumbnails section, select the Thumbnail Previews Always option. By following these steps, you should be able to force Windows to draw live previews with thumbnails at the 5040x1050 resolution on your system. If the issue persists, consider checking for any specific Matrox TripleHead2Go software settings that may affect thumbnail previews.

Windows 7 How to force taskbar live previews on a triple-screen setup?

Danila

Senior Member

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