User Profile

Hello,I am refering to the below link which describes the steps for "transfer app" to another iTunes account or Team.https://developer.apple.com/library/ios/documentation/LanguagesUtilities/Conceptual/iTunesConnect_Guide/Chapters/TransferringAndDeletingApps.html#//apple_ref/doc/uid/TP40011225-CH31-SW9I am not able to start with the first step as as I do not see the "Transfer App" button in my App information page using my Itunes credentials. My role is "App Manager" in ITunes.Need help/steps to perform the same? There is no documentation about the User roles needed to perform this task.