Tip Advanced Time Selection Options
From OpenFOAMWiki
Valid versions: 
Starting with Version 1.5 most OF-utilies use the timeSelector to make it possible to specify more than one time-step with the -time option.
The old (and still working) usage of -time is to select the time 1200 for reconstruction:
reconstructPar -time 1200
If we wanted to reconstruct timestep 1300 as well we would have to retype
reconstructPar -time 1300
With the new -time we specify that we want to reconstruct from 1200 to 1300
reconstructPar -time 1200:1300
It is also possible to specify to reconstruct the timesteps up to 500
reconstructPar -time :500
or starting with 3000 until the end
reconstructPar -time 3000:
or we can do all of them at once (using the comma to seperate the options):
reconstructPar -time :500,1200:1300,3000:
