You have not specified your JDeveloper version. I am assuming JDev 18.104.22.168.
1) Navigate to a JSF page or fragment, otherwise the ADF Faces palette should not be visible;
2) There is a combobox immediately below the title of Component Palette's window. Select "ADF Faces" within it;
3) Look at left part of the bottom border of the Component Palette window. There is a small icon similar to a list of small diamonds, which is very near the bottom border. If you have minimized some subpalette accidentially, you can restore it by clicking this icon.
Edited by: Dimitar Dimitrov on Jan 11, 2012 9:06 PM