[SAC-HELP] waveforms clipping and aligning

[Tatiana Matveeva]

Hello!
I need help to do traces stacking with SAC. For the start:
1) I have preprocessed (bandpass filtered) waveforms where I added to the
header time of the first arrival.
2) I need to clip these files (10 sec before and 10 after the first arrival
) and align them.
3) I need to stack these traces.
1) and 3) - is not a problem.

I am not sure how to handle 2). I also would like to plot all these clipped
traces on one plot.

Thank you.
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