-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.
-
+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 \fIphysical screen\fP may be scrolled at the same time.
+.PP