The Display option

1 - Show redirects. This will display all requests which elicit a "redirect" response from the server.

2 - Show cookies received. This will display all cookies that were sent by the remote host.

3 - Show all 200/OK responses. This will show all responses which elicit an "okay" (200) response from the server. This could be useful for debugging.

4 - Show URLs which require authentication. This will show all responses which elicit an "authorization required" header.

D - Debug Output. Show debug output, which shows the verbose output and extra information such as variable content.

V - Verbose Output. Show verbose output, which typically shows where Nikto is during program execution.