-The \fBscroll\fR routine scrolls the window up one line.
-This involves moving
-the lines in the window data structure.
-As an optimization, if the scrolling
-region of the window is the entire screen, the physical screen may be scrolled
-at the same time.
-
-For positive \fIn\fR, the \fBscrl\fR and \fBwscrl\fR routines scroll the
-window up \fIn\fR lines (line \fIi\fR+\fIn\fR becomes \fIi\fR); otherwise
-scroll the window down \fIn\fR lines.
-This involves moving the lines in the
-window character image structure.
-The current cursor position is not changed.
-
-For these functions to work, scrolling must be enabled via \fBscrollok\fR.
-.SH RETURN VALUE
-These routines return \fBERR\fR upon failure, and \fBOK\fR (SVr4 only specifies
-"an integer value other than \fBERR\fR") upon successful completion.
+.B scroll
+scrolls the given window up one line.
+That is,
+every visible line we might number
+.I i
+becomes line
+.IR i "\-1."
+The text of the top line in the window disappears and the bottom line
+is populated with blank characters;
+see \fB\%bkgd\fP(3X) or \fB\%bkgrnd\fP(3X).
+As an optimization,
+if the scrolling region of the window is the entire screen,
+the physical screen may be scrolled at the same time;
+see \fB\%curscr\fP(3X).