Left - This designates the distance from the Left of the screen to the Video/Image Window in Pixels, if you put a negative figure, i.e. -100, this will convert into the distance from the Right of the Screen.

In the event that you are using a Dual VGA configuration (Only available in Windows98), you will need to add a figure to the figures given for the first screen resolution to produce the image on both Monitors. i.e. If the first Monitor is 800 x 600, you will to enter a figure higher than 801.