I have a newer monitor (1920×1080) and and older one that’s 1600×1200.
The 1600×1200 is the main desktop. Under Windows XP, that means there’s a small “wall” of 120 px where the mouse can’t get from one screen to the other.
Is there any way to configure it so that it will allow it to move into the other screen without the wall?
Answer
For those displays, there will always be a difference of 120 vertical pixels. You can move the “wall” to the top or bottom of the screen, or a mixture. In Display Properties in Control Panel:
Click the monitor icons and drag them to positions that represent how
you want to move items from one monitor to another, and then click OK
or Apply to view changes.
I have a similar arrangement and I prefer to have this gap at the top of the (primary) 1600×1200 display, with the other display on the right, and aligned to the bottom. This makes it easier to close windows that are maximised on either display, thanks to Fitts’s law.
Attribution
Source : Link , Question Author : chris , Answer Author : sblair
