To change the web hosting type in the Plese please follow the following settings:-
1) Login to Plesk control panel.

2) Click on "Websites & Domains".

3) Click on "Add New Domain"

4) Type Domain name as marked in RED.
DNS Setting select as required by you.
Hosting Type seleect as required by you. ( Web Hosting, Forwarding and No Hosting )

5) Click Ok.
