How to adjust thumbnail size in Windows 7

Windows displays thumbnails of the opened windows in the taskbar if the mouse is hovering over it.
Unfortunately, the size is too small in case of high screen resolutions.A value in the registry regulates the size of the displayed thumbnails.
The size of the thumbnail preview can be changed as follows.
Enter ‘regedit’ in the input field of the start menu and press Enter.
Then confirm the request of the user account control with ‘Yes’ and navigate to ‘HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Taskband’ key.