Navigator items can easily be added. Behavior of editor and other parts can directly be changed from the navigator.

In this example, an item is added which provides a way to launch an List/Detail editor with a query of all customers of USA with new features.
Use modified query as shown in complete query page.

Add following XML lines where your want the new item to appear:

        <item label="List/Detail customers of USA" image="#IMG(adi://org.adichatz.engine/./IMG_QUERY.png)" id="customerUSAQUERY">
            <params>
                <param value="adi://myproject/./country" id="MESSAGE_BUNDLE"/>
                <param id="ICON_URI" value="platform:/plugin/org.adichatz.engine/resources/icons/IMG_QUERY.png"/>
                <param id="TITLE" value="List/Detail customers of USA"/>
                <param id="TOOL_TIP_TEXT" value="#MSG(adichatzGroupNavigator,customerQueryEditorToolTipText)"/>
                <param id="RESOURCE_BUNDLE" value="adi://myproject/./customer"/>
                <param xsi:type="listDetailContentProviderType" adiResourceURI="adi://myproject/model.customer/CustomerQUERY" id="CONTENT_PROVIDER" preferenceURI="preferenceName://usa"/>
                <param id="ADI_RESOURCE_URI" value="adi://org.adichatz.jpa/query/ListDetailQueryForm"/>
                <param id="TABLE_RESOURCE_URI" value="adi://myproject/model.customer/CustomerTI"/>
                <param id="DETAIL_RESOURCE_URI" value="adi://myproject/model.customer/CustomerDI"/>
                <param id="DUPLICATE_EDITOR" value="true"/>
                <param id="ADD_EDITOR_TOOLBAR" value="true"/>
            </params>
            <customizations>
                <tabular refreshAtStart="true" background="#COLOR(SWT.COLOR_TITLE_BACKGROUND_GRADIENT)" id="tableInclude:table"/>
                <sashForm id="ListDetailSashForm" orientation="SWT.HORIZONTAL" weights="3,1"/>
                <section id="detailInclude:detailContainer">
                    <listeners>
                        <listener listenerTypes="BEFORE_SYNCHRONIZE" id="beforeSynchronize">
                            <code>reinitLayout(controller, true);</code>
                        </listener>
                    </listeners>
                </section>
                <composite id="detailInclude:fieldsComposite">
                    <layout layoutConstraints="wrap 4" columnConstraints="[align right]10[grow,fill]25[align right]10[grow,fill]"/>
                </composite>
                <action id="masterDetailTBM:changeOrientationAction">
                    <listeners>
                        <listener listenerTypes="PRE_RUN" id="preRun">
                            <code>reinitLayout(controller, false);</code>
                        </listener>
                    </listeners>
                </action>
                <additionalCode>import org.adichatz.engine.controller.collection.SashFormController
import org.adichatz.engine.controller.AWidgetController
import org.eclipse.swt.SWT
import org.adichatz.engine.controller.collection.SectionController
import net.miginfocom.swt.MigLayout
private void reinitLayout(AWidgetController controller, boolean inverse) {
SashFormController sashFormController = (SashFormController) controller.getRootCore().getFromRegister("ListDetailSashForm");
SectionController sectionController = (SectionController) controller.getRootCore().getFromRegister("detailInclude:detailContainer");
if (null != sectionController.getControl()) {
    boolean horizontal = SWT.HORIZONTAL == sashFormController.getControl().getOrientation();
    horizontal = inverse ? !horizontal : horizontal;
    if (horizontal)
        sectionController.getComposite().setLayout(new MigLayout("wrap 4", "[fill, align right]10[fill,grow]25[align right]10[fill,grow]"));
    else
        sectionController.getComposite().setLayout(new MigLayout("wrap 2", "[fill, align right]10[fill,grow]"));
}}</additionalCode>
            </customizations>
        </item>

renders the new layout: