I have a file, xyz.cpp. I want to open two instances of this file in Visual studio (BTW, I am using Visual Studio 2005). Why would I want to do so? I want
With the your file opened, go to command window (menu View → Other Windows → Command window, or just Ctrl + Alt + A)
Type:
Window.NewWindow
And then
Window.NewVerticalTabGroup
worked for me (Visual Studio 2017).
Or using menus:
Menu Window → New Window
Menu Window → New vertical tap group