How can I see what permissions each user/group has?

To view a specific groups permission profile you have to go to: 

• Settings
• Groups
• Click on the relevant group
• The ticked boxes show the permissions they have, if you tab over to the user's box you can see who is within that permission group. 

To determine which group a specific user is in you can go to: 

• Users
• Click on the user
• Tab across to group to get a full list of the groups that the user is part of.