Pre-requisites:
Permission as mentioned below, on the project template in which role privileges are to be assigned:
To manage the project template, 'Admin' permission assigned to you, your organization or a user group in which you are a member.
Below are the steps to assign role privileges in a project template:
1. In 'Projects' area, navigate to the project template where role privileges need to be assigned.
2. Right click on the required project template and select 'Roles & Users' then select 'Role Privileges'.
Alternately, in the thumb view, do a mouse hover on the project template thumbnail and click on 
icon. A layered page opens. Click on 'Role Privileges'.
3. It shows the existing project roles and their privileges with the ability to assign or remove privileges based on roles assigned to users. Additionally, you can also add new roles if required.
4. Follow the steps as required to assign role privileges in a project (step 2 to step 8).
Next Article: Assign Proxy Access to Users (in a Project Template)