You need to give access to user but you would like to control this access ? "Roles" will allow to give specific access to users. You can create as many as you want.
How to create these roles ?
- Click on the wheel logo on the top right corner to display parameters.
- Click on "Roles".
- Click on "New".
- In "details" tab you can choose if the role has the full access. If not, click on the "Permissions" tab to set the different access.
- The left column represents the different sections of the instance.
- The right column represents the access that you can set.
When the role is created, you could define it when creating or editing a user. Check this article that shows how to create users.