Fields
This screen lists the Fields used in a Source file and used across different programs and modules.
When you click on a field name, the Variable Where Used window opens, displaying a list of all objects where that variable is referenced.
Its Level and Callstack field is editable, change the levels and refresh the whereused of that particular variable.
It has different options 
, clicking on which gives further details about that particular file.
Where Used
Clicking on 
icon, a screen appears with the list of objects where this field is being used.
The detailed information about the whereused option can be seen here Where Used
Field Usage
Clicking on 
icon, a screen appears having details of in which programs this selected field is being used.
The eloborated information about the field usage screen is explained in Fields
Click on Source option, to view the Source File where this variable is defined.
