I Have selected a windows graphic mode so while developing the
code, I dont have to wait for the monitor to change over
to fullscreen display which takes more time.
I mentioned debug mode as your screen shot appeared to be windowed and I know that it is damn slow compared to full screen. I develop in debug mode so a) it's windowed and I don't have to wait for the monitor to change and b) it picks up any crashes and displays them. Then I often do big tests in full screen mode when I am sure any new code is stable.