There May instances Where the About this Page link in OAF Pages are Hidden. This Can be Removed or Added to a Page Depending Upon the Below Mentioned Setup.
Go to System Administrator Responsibility
Check and Set the Below Mentioned Profile Option Values
1. FND: Diagnostics
2.Personalize Self-Service Defn
Once these profile options have been changed, users will need to log out and log in for the change to take effect