Press the "F11" key. Also on a Desktop, it requires you to make a click on maximize option to get browser window scaled to full screen. Now the question is, why cant Internet Explorer open in the full maximized window mode like the other browsers in its category do? Internet Explorer 8 Window. Navigation Title Bar Address New Tab.Find Open new window Print a Web page Select all items Zoom in Zoom out Full Screen Mode Help. Internet Explorer Full Screen Off.