I read in http://jdevadf.oracle.com/adf-richclient-demo/faces/components/panelCollection.jspx that "if the table is a child of af:panelCollection, then an implementation of multiple column sort use case already exists using Panel Collection View -> Sort -> Advance menu option"
I've used panel collection on my table, this option for multi-column sort is visible but there is a popup window containing criteria for column slection View -> Sort -> Advanced.
In my case no window is popping-up.
Can anyone tell me how to popup a window like that??