How to Change the Document Root of Addon Domain or Subdomain in cPanel?
A folder that is exclusive to a domain is called the document root. Every cPanel addon domain and subdomain has its own unique document root folder. Users of cPanel can modify the document root of their subdomains and addon domains.
For Changing the Document Root of Addon Domain
1. Log in to your cPanel account.
2. Scroll down to the Domains sections and click on Addon Domains.

3. Go to the Modify Addon Domain section and click on the document root’s edit icon of the addon domain you want to change.

4. The Change Document Root window will pop up. Enter the new document root in the Document Root field and click the Change button.

The cPanel will set the new document root for your addon domain.
For Changing the Document Root of Subdomain
The procedure is almost the same as for changing the addon domains.
1. Go to the Domains sections and click on Subdomains.

2. In the Modify a Subdomain section, click the document root’s edit icon of the subdomain you want to change.

3. In the Change Document Root window, enter the new document root in the Document Root field and click the Change button.

It will set the new document root for your subdomain.
Warning:Occasionally, altering the document root could crash the website. This occurs when the database or web application’s paths and links are broken. If this problem arises, get in touch with the developer or systems administrator.