ass="PROPERTYTABLE"><code>Heights&nbsp;</code></td><td valign="top" class="PROPERTYTABLE"><value>double vector</value></td><td valign="top" class="PROPERTYTABLE"><description>Height of each of the rows. Positive entries indicate fixed sizes in pixels, negative values indicate relative weights for resizing.</description></td></tr><tr><td valign="top" class="PROPERTYTABLE"><code>Padding&nbsp;</code></td><td valign="top" class="PROPERTYTABLE"><value>positive integer</value></td><td valign="top" class="PROPERTY