Thread: Time Axis

Greetings all,
I was wondering if anyone knows how I could completely re-do the time axis
may be by changing the header? Say I cut a window and want to assign 0 to
starting point so that I can have the same time scale for all the cut
seismograms ? e.g. I cut a window between 250-300 s in seismogram A and a
window between 300-350s in seismogram B. Now I want to have the same time
scale for A & B so that both A, B will have the time scale as 0-50s so that
I can align the seismograms?

Thanks !

Januka.