Step 1: Login to the Plesk control panel with your login credentials.
Step 2: Click the Websites and Domains section.
Step 3: Then select the domain whose document root needs to be changed.
Step 4: Click the ‘Hosting Settings’
Step 5: Provide the new root document path in the ‘Document Root’ section.
Step 6: Click OK to save the changes. Now the document root for the selected domain has been changed.