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 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.