-to white on black and cannot be changed). If the color-pair was previously
-initialized, the screen is refreshed and all occurrences of that color-pair is
-changed to the new definition.
+to white on black and cannot be changed).
+.PP
+If the color-pair was previously
+initialized, the screen is refreshed and all occurrences of that color-pair
+are changed to the new definition.
+
+As an extension, ncurses allows you to set color pair 0 via
+the \fBassume_default_colors\fR routine, or to specify the use of
+default colors (color number \fB-1\fR) if you first invoke the
+\fBuse_default_colors\fR routine.