To Change Hosting type of Domain In Reseller Account, please follow the following settings:-
1) Login to Plesk control panel.

2) Click on "Subscription"

3) Click on "Manage Hosting" in front of the domain

5) Click on "Websites and Domains".

6) Click on the "Domain Name".

7) Click on Domain name from the bottom and then Click on "Change" option in front of "Hosting type".

8) Select the hosting type from the two options :-
Forwarding :-You will get 2 options if you select forwarding.
a) Standard forwarding:- In this a user is redirected to the site and the actual site's URL is shown in the user's browser, so the user always knows that he or she is redirected to another URL.
b) Frame forwarding:- In this a user is redirected to the site without knowing that the site actually resides at another location, therefore, Frame forwarding should be preferred.
c) Specify the destination URL: the current Web site address that you would like this domain to point to.

9) Click Ok.
