Circles are created in the same way that Roles are created, through a governance meeting or asynchronous proposal. In GlassFrog, Circles are a special kind of Role.  

To create the Circle, start a Governance Meeting, add an agenda item and then select this agenda item to begin creating a proposal. The following screen will appear:

Next, select Add/Edit Role and then New Role/Circle:

Check the checkbox to make the role a circle:

If the proposal is accepted, the new circle will be created successfully.