Submitted by Don Houle, TriCore Solutions, Director, Oracle Professional Services.
Oracle Tip #12 - How to hide the "Preferences" link
There are several ways to accomplish this task.
The easiest way is by just changing a profile option which can be set on Site, Responsibility and User level.
The profile option has the name General Preferences Show Flag. The default value for this is NULL (which means Yes).
Use responsibility System Administrator and navigate to Profile - System and query for the profile option General Preferences Show Flag.
Set the profile option value to No and save it. Logout and login to see the results.