Different ranges for histogram of session times?

[JosefMachytkaNetApp]

Hello guys, thank you very much for your tool. It is really helpful! Great work!

I have one use case for which I would like to set more granular ranges for histogram of session times.
But I did not find any settings for it. Is there some way to do it from command line?
Or modifying some internal parameters in code?

Thank you very much.