IBM 3270 - Page 105

4. Press the Left Cursor key until the right
border is near the center of the screen.
You may
begin to see part of the second
window,
which is behind the first, appear as
the border moves to the left.
If you move the border too far to the left, use
the Right Cursor key to move it back.
9-8 Book 3 - Using the Control Program