Time is normally shown and entered in h:m:s.f format, where h = hours, m = minutes, s = seconds, and f = fractional seconds. Places on the right may be omitted, in which case they default to zero. For example:
|1:2||one hour + two minutes|
|1:2:3||one hour + two minutes + three seconds|
|1:2:3.5||one hour + two minutes + three and a half seconds|
|1:2:3.456789||one hour + two minutes + three seconds + 456789 microseconds|
|0:0:0.4||four hundred milliseconds|
Time can alternatively be shown and entered in sample frames, by enabling the Show time in sample frames option. Sample frames are zero-origin, i.e. the first frame is frame zero.