hacking-howto: add tabbed layout (Thanks msi)

diff --git a/docs/hacking-howto b/docs/hacking-howto
index c9da4e4314c82e9b2335856ed2113dd9fef05b88..ce97d2c8dca5185cfa35776931f6c0ff0333e4af 100644 (file)
--- a/docs/hacking-howto
+++ b/docs/hacking-howto
@@ -227,8 +227,9 @@ moving them to the bottom you create a new row).
 === Container
 
 A container is the content of a table’s cell. It holds an arbitrary amount of
-windows and has a specific layout (default layout or stack layout). Containers
-can consume multiple table cells by modifying their colspan/rowspan attribute.
+windows and has a specific layout (default layout, stack layout or tabbed
+layout). Containers can consume multiple table cells by modifying their
+colspan/rowspan attribute.
 
 === Client