You would need to open the internet browser and go to the Pogo website so as to make the changes. To increase the size of the screen you need to select the start menu on the control panel of your computer. You click on the drop-down list with the resolution option and select a resolution that you would like. The next step is to select the apply option so that the changes can be saved. You can go to http://www.ehow.com/how_7800270_make-games-fill-whole-screen.html for more information.