I've only seen this suggested as a comment on another post, so I thought I'd make a dedicated post about it. I would like to see a "Log In As" button available from a user's profile page. So when you're done adjusting access/layout template/teams/groups, you can quickly check how things look from th...

These would be excellent features. I also agree with Mark that the Log In As feature should be available from the action menu on a user's profile.