page scroll with overlapping

["Kikutani, Makoto" <kikutani@xxxxxxxxxxxxxx>]

Hi,

I have a slang application which is using SLscroll_pagedown and 
SLscroll_pageup. These page scroll functions have no overlapping line. 
But slrn's page scroll has one line overlapping.
How do I do this with my application ?

Thank you.

-- 
Kikutani, Makoto  g@xxxxxxxxxxx or kikutani@xxxxxxxxxxxxxx