text: You can use "?" button on the right. It will search nearby features. Look for tram stop and you will get list of all tram lines like this:
  http://www.openstreetmap.org/node/282096322
  
  You can also give feedback to authors of mapnik tiles or transport map tiles (more info is on the OSM WIKI).
  
  As this is not a map data issue, I'm closing the note.