Add Requisition or Candidate Fields to List Formats

Summary

Add Sort Fields to Req ? Candidate Lists

Content

Recruit users wish to sort both Requisition List & Candidate List by specific fields.  How do I add new fields to the already existing List Format?  I would like to add options for the recruit users to add to any of the list formats.  The fields I wish to add are not available in the open check boxes listed.

Fields I would like to add:

1. Waiting on Approver
2. Job Function interested 

Thanks in advance for your assistance. 

Staci