--- a/src/source/appextend.rst	Tue Jun 05 11:50:24 2018 +0200
+++ b/src/source/appextend.rst	Tue Jun 05 12:05:59 2018 +0200
@@ -11,3 +11,4 @@
     howto-portlet
     howto-renderer
     howto-paragraph
+    howto-skin

--- a/src/source/developerguide.rst	Tue Jun 05 11:50:24 2018 +0200
+++ b/src/source/developerguide.rst	Tue Jun 05 12:05:59 2018 +0200
@@ -7,9 +7,8 @@
 .. toctree::
    :maxdepth: 2
 
-   zca
-   package_layout
+   Zope Component Architecture <zca>
+   Package directory layout <package_layout>
    appextend
-   zmi_integration
    traverser
    tales