Change Group (Don't see any available groups)

Hi there,

Perhaps this is a noob question, but in the Lab Manual, it asks frequently for you to use the button at the top (picture of two people) to change groups, but when I click it, there are no groups available in my list. I have two questions.

1.) What is the advantage of changing groups on the fly? Are you changing the group permissions, or changing the group being modified?

2.) How do I populate this list?

Best Regards,

Chad.