<preferencesSheet name="countWordsOptions">
<class>CountWordsOptions</class>
</preferencesSheet>
<preferencesSheets name="preferencesSheets">
<insert />
<preferencesSheet name="countWordsOptions" />
</preferencesSheets>The custom preferences sheet implemented by Java™ class CountWordsOptions (code contained in ) is declared using a preferencesSheet element.XXE_install_dir/doc/gui/tutorial/custom_parts.jar
Then this sheet is inserted in the standard set of preferencesSheets (preferencesSheets element called "preferencesSheets" found in default.xxe_gui), after all the other sheets, by the means of the <insert/> facility.