I've added a feature layer into a Web Map which contains time enabled data (event dates). The time slider appears in the map and plays correctly. However, I want to configure the time settings so that I can alter the Time Display values. The problem is that, when I click on 'Show Advanced Options' in the Time Settings window, nothing happens except that the 'Show Advanced Options' text disappears. The only thing I can do is adjust the playback speed.
Have I missed something obvious?