Alt + Tab is a convenient keyboard shortcut to switch between open windows in Windows operating system. This is an old Windows feature; however, Windows 7 and later version show an enhanced tile view when you press Alt + Tab keyboard shortcut. Windows 10 also retained the tradition and shows window thumbnails.
Depending on the number of open windows, the thumbnail preview size of windows is scaled up or down.
The enhanced tile view shows a nice preview of open windows. However, many users requested for a method to bring back the Windows XP-style Alt + Tab menu. Fortunately, there is a method to switch back to Windows XP-style Alt + Tab menu. There is no such setting; however, you can use a small registry hack to accomplish this task.
Please follow this procedure to revert to XP-style Alt + Tab menu.
Bring Back the Old (Windows XP) Alt + Tab Dialog on Windows 10
Hold the Windows Key and Press R. Type regedit in the run dialog and click OK
Windows registry editor will open. Navigate to the following registry key.
Right click on Explorer and choose New -> DWORD (32-bit) and name the new value as AltTabSettings
Double click the new value called AltTabSettings and Change the Value Data to 1 and then click OK.
Close the registry editor. You now have successfully changed the look of Alt + Tab thumbnail preview. However, these changes will not take effect unless you restart your computer. You can restart your computer now, or you restart your computer at another convenient time.
Note: you can change the Alt + Tab menu to the new style again. To do so, repeat the procedure to open the Windows registry editor and delete the 32-bit DWORD value named AltTabSettings that you have created previously.