The buttons that you may choose to have offered on the top button bars of 
Info pages (see section4.6), are specific to the classes of objects that have Info pages:
Please bear in mind that the button bars shown below represent the maximum of actions that can be performed on objects of the respective class. A few of the actions may not be available in specific situations, depending on your access rights for a specific object and on the current state of the objects involved.
Within these technical limitations you are free to configure your own personalized set of top button bars for Info pages (see section 4.3).
to display a brief explanation of the respective action.
