1- Login to your cPanel.
2- Choose (File Manager).
3- Choose (WWW) folder as shown in the following picture:
4- Right-click the folder you need to change its permissions, then choose (Change Permissions) from the drop-down list, as shown in the following picture:
5- A pop-up window will be displayed, check the box to be modified (upon the required permission) and the permissions will show up below the options upon your choice.
6- After you finish, press (Change Permissions).
7- Folder permissions will be changed, as shown in the following picture: