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How Can I Enlarge Taskbar Preview Windows?

Many Windows users use the preview feature of the taskbar to quickly see the contents of open Windows, without having to switch to the window. This is especially useful if you have two monitors.

By default, the size of the preview windows is just 200 pixels square. That is much too small to be able to read the contents of a document. However, with a small change in the registry, you can enlarge the view in Windows 10/8.1/8/7:

1. Press [Windows Key] + [R] to open the Run dialogue, type REGEDIT and click OK.
2. Navigate to the registry key: HKEY_CURRENT_USER\ Software\ Microsoft\ Windows\ CurrentVersion\ Explorer\ Taskband. If any of the sub-keys do not exist, you can create them by right-clicking on the
previous key and choosing New > Key.
3. Right-click in the right-hand panel of the Registry Editor and then select New > DWORD Value.
4. Name the new registry value MinThumbSizePx
5. Click on the new value and change the setting to Decimal, then type in the value 300.
6. Close the Registry Editor and restart your PC.

Note: the size of the preview window is given in pixels and the default Windows value is 200. In testing, 300 to 500 have proven to be the best values. Experiment with the setting and see for yourself which preview window size is best for you.