Run the following script and display names will be displayed above avatars' heads:
For the avatars of people who have set their display names, that is.
Further details: http://ctrlaltstudio.com/hifi/nametags
UPDATE, 18 Mar 2016:
Known problem: The text displayed is not very legible; it looks "bloated". I've submitted a PR that improves this: https://github.com/highfidelity/hifi/pull/7336
To be implemented: Menu item and shortcut key that toggles display of nametags on/off.
Wasn't that fix mainstreamed?
@Balpien.Hammerer There was a fix to text3d recently to make it visible again: https://github.com/highfidelity/hifi/pull/7256 whereas my PR addresses the now overly fat characters.
UPDATE: Added menu item, View > Nametags, shortcut Ctrl+N, that toggles nametags on/off.
Updates:* Fade nametags with distance.* Reduce size of nametags with distance.
Update: Added tablet/toolbar button that toggles display of nametags on/off.