left
0,2560,0,0

middle
1280,1280,0,0

right 0,2560,0,0


see how it works now?

first number: how far to put the left edge of the window from the left edge of the screen.

second number: how far to put the right edge of the window from the right edge of the screen

3rd: how far to put the top edge of the window from the top edge of the screen

4th: how far to put the bottom edge of the window from the bottom edge of the screen