Right-click on a blank area on your Windows desktop.
The Compaq MV520 is a CRT monitor that came packaged with several models of Presario desktop computers. To change the resolution on the monitor, you simply need to change the resolution inside Windows. The monitor will sense the new resolution and adjust the screen settings automatically. The MV520 is a 15-inch monitor with a maximum resolution of 1024-by-768 pixels.
Click "Screen resolution" to open the Screen Resolution window.
Select the new resolution under the "Resolution" drop-down box.
Click the "Apply" button. Windows will switch to the new resolution and display a window asking if you want to keep the settings.
Click "Keep changes" to save the new resolution. Select "Revert" to change back.