AMOSi:Vscroll
an example can be found on AMOSPro_Examples:Examples/H-2/Help_22.AMOS
Scrolls some text in your current window vertically by a single character.
Vscroll type
Type can take one of four values:
1 = Move all text on the current line and below one place down
2 = Move all text on or below the cursor line one place up
3 = Scroll up lines from the top of the window to the cursor line.
4 = Scroll down lines from top of window to current cursor position.