+ This implementation, and others such as Solaris, sets the
+ current position to 0,0 after erasing via <STRONG>werase()</STRONG> and
+ <STRONG>wclear()</STRONG>. That fact is not documented in other implemen-
+ tations, and may not be true of implementations which were
+ not derived from SVr4 source.
+
+ Not obvious from the description, most implementations
+ clear the screen after <STRONG>wclear</STRONG> even for a subwindow or de-
+ rived window. If you do not want to clear the screen dur-
+ ing the next <STRONG>wrefresh</STRONG>, use <STRONG>werase</STRONG> instead.
+