There are two types of Roles that can be added: Subscriber and Viewer.

A Subscriber is a user that can access ScaffoldIQ and make changes to the scaffolds.
A Viewer is a user that can access ScaffoldIQ but can only view the scaffolds and cannot make any changes other than adding comments.
To add a Subscriber role, select the down arrow and choose Subscriber.

Here you can add a new role, along with a description, and select which permissions the subscriber user will be granted.

Select Viewer to create a Viewer role

Here you can add a new role, along with a description, and select which permissions the viewer user will be granted.
