Win7 Ultimate How to customize the taskbar preview box size

1. Press WIN+R, open the run dialog, then enter “regedit” and press Enter;
2, enter the registry editor, open Open the "HKEY_CURRENT_USER" folder after the Registry Editor, and then open the "Software— Microsoft— Windows— CurrentVersion— Explorer--Taskband" folder;
3, then select the “Taskband” item and then on the right Create a new “Dword” value in the window and name it “Minthumbzizepx”;
4. Then double-click the previously created Dword value “Minthumbzizepx” to set the value to “400””;
5 Log out of the Win7 system, or restart, you can try to reach the size you want, if you have not, you can continue to adjust the value of "Minthumbzizepx".