LE"><code>ShowMarkings&nbsp;</code></td><td valign="top" class="PROPERTYTABLE"><value>[ on | off ]</value></td><td valign="top" class="PROPERTYTABLE"><description>Show markings on the draggable dividers (default 'on').</description></td></tr><tr><td valign="top" class="PROPERTYTABLE"><code>Sizes&nbsp;</code></td><td valign="top" class="PROPERTYTABLE"><value>double vector</value></td><td valign="top" class="PROPERTYTABLE"><description>The size of each of the child elements. Positive entries indicate fixed si