You might not want to display information about all the load objects in your program: for example, you might want to see only the metrics that apply to your program files, and not to any system libraries.
To select one or more load objects to display information about:
If you select a subset of load objects and use the Callers-Callees display, it is possible to have a selected function which shows no callers. This is because the caller is in one of the load objects which has been deselected.