To display collaborators on the Users > Staff Members screen:
Go to Settings > Review > General
Scroll to the Collaborators section.
You'll see two options:
Show collaborators column on the staff members screen?
Show the full names of the collaborators?
If only the first option is selected
A new column will appear on the Staff Members screen showing a collaborator icon. Hovering over the icon will display a tooltip with the collaborator name(s).
If both options are selected
The new column will appear and show the full names of the collaborators directly in the column (instead of just an icon).