How can I customize viva to set:
1. "split trip" while not "combined trip"
2. plot to new strip by default
I don't know what you mean by '"split trip" while not "combined trip"' - it doesn't make sense to me (even assuming that you meant "strip" instead of "trip").
For the second question, this is Graph->Plot to new strip. You can set this as your default by putting this in your .cdsinit:
envSetVal("viva.rectGraph" "stripChartOn" 'string "true")
or this in your .cdsenv :
viva.rectGraph stripChartOn string "true"
Thank you very much! It does be what I wanted.
For the first question, yes, it should be "strip". I means I want to choose "split current strip" by default while not "combine all analog traces".
When I set .cdsenv as you said, it also works. The problem is gone.