Request Aditional Fields & Disable Solutions for Requester or complete

Request Aditional Fields & Disable Solutions for Requester or complete

Dear ME Team,
 
As you read my Tittle above, i just want to know is there any option for,
 
Request aditional field in this servicedesk plus application like problem additional fields ?
 
as well as,
 
Am i able to disable solutions tab to requester or completely ?

                  New to ADSelfService Plus?