How do I filter the Staff List by Group?

On the Staff List, click the Green dropdown Selector in the header of the Page and select Filter. The last Row of filters will be the Group-related filters. From here, you can choose to filter your groups in two different ways:

Group Type

Group Type allows you to combine Individuals, Account-Based Groups, or Number-Based Groups. 

Group Title 

Group Title allows you to select specific groups that you want to filter the Staff list down to.