The Plugin implements the following functionality:
- drag-and-drop to re-arrange columns
 - check-box menu to show or hide columns
 - resizable table to change width
 - resizable columns
 - save settings and restore defaults.
 
IE has a nasty habit of caching the page, so make sure you do a refresh to retrieve the saved layout.
Full details of how to implement are in chapter 9 of my book Oracle Application Express 4.0 with Ext JS

