Abstract: The present invention provides an improved method and system for displaying images on a display screen. It includes a display screen, an on-screen memory, a cursor memory, and a display processor. The display processor in a normal mode displays on the display screen a graphics image stored in the on-screen memory. When the display processor is in an overlay mode, it simultaneously displays the stored graphics image, and the image stored in the cursor memory in an image window over a selected portion of the stored graphics image in the on-screen memory. The image window hides the selected portion of the stored graphics image. While the display processor is in the overlay mode, a second image is prepared and stored in the selected portion of the stored graphics image which is hidden by the image window.