This should be simple. I can find a View menu that lets me add a secondary ruler which shows a time line, but it starts at minute 1 instead of minute 0. The manuals I have say refer to Preferences > General > Display which doesn't exist, but Preferences > Display > General does. There I can set the time display to minutes, seconds, etc, but there is nothing there to set the start time. Searches for Rule tell me that there is a ruler that can be displayed in various ways, but no specific on how to do it. Changing the options for the LCD didn't get rid of the minute 1 start time. I'm stumped. How do I change the main ruler to show time in min:sec: starting at zero, without a secondary ruler?