I'm looking for an interface that will do the following task. I have a table with a list of locations and settings for each location by user.
So, if I pick a user "John Doe", I'm presented with the following grid:
Location | Add | Read | Delete | Receive notifications New York [ ] [x] [ ] [x] Seattle [x] [ ] [ ] [ ] .......
This works great, but I have to pick each user separately. And number of users can be >100. Is there a way to add users to this table so I can configure all users at once without selecting each user separately? What UX designs/principles can be used?