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• Saved filter: a saved filter containing requirement issues
  
  
• Fix Version: version assigned to requirements
• Assignee: the requirement's assignee
• Key or Summary: the requirement's key or summary
• Status: the workflow status
• Resolution: the workflow resolution
• Include Previous Versions: take into account previous versions when searching for a requirement

There is also an options menu (section D) where you can choose the visualization type for the report:  

• hierarchical - only the parent requirement issues will be presented in the report, if the filter includes them. Sub-requirements can still be visualized in the overall details table.
• flatten - the requirement issues will not consider the parent/child relationship. All parent and child requirements will be considered and showed similarly in the report. 

It's also possible to configure the report with additional parameters (section C):

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