<!--Copyright (C) 1988-2005 by the Institute of Global Environment and Society (IGES). See file COPYRIGHT for more information.--> <h2>swap</h2> swaps buffers, when double buffer mode is <code>on</code><p> <h3>Usage Notes</h3> <h3>Examples</h3>
<!--Copyright (C) 1988-2005 by the Institute of Global Environment and Society (IGES). See file COPYRIGHT for more information.--> <h2>swap</h2> swaps buffers, when double buffer mode is <code>on</code><p> <h3>Usage Notes</h3> <h3>Examples</h3>