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what is the difference between minmax, reminmax and meanstddev? If I look at a scatterplot, I don’t see a difference: the same bounds for all three.

not all views implement the same autobounds. Scatterplot only uses minmax for example. While reminmax (which uses the second min-max values excluding the first ones, in the case of a nan or inf) is used by wave/multiwave. Meanstddev is used only by Sonogram.
Yes, we actually need to clean up and make uniform the autobounds and at least document it better.

Thanks for the clarification!
The documentation at the moment is a bit concise, but I do not underestimate the amount of work that will cost.