The Applicant Information section on the Application Edit screen displays read-only information about the applicants on the deal. This section can be directly accessed by clicking Application Information > Applicant Information in the Left Navigation Pane.
From this section you can open the Applicant Details screen to edit details of the applicants. To do so, click the Edit button.
In addition, from this section you can change the primary applicant. See Changing the Primary Applicant.