[Kst] how to show last 100 points of a file that is growing with kst2?

[Timo Juhani Lindfors]

Hi,

in kst1 I could set

minExp: "[INDEX/Max] - 100"
maxExp: "[INDEX/Max]"

to get a plot that always shows the last 100 data points. This is very
useful for watching how data is being collected to a file that
constantly grows. I sent patches to document this in kst1 about a year
ago in

https://bugs.kde.org/show_bug.cgi?id=241400

How can I do this in kst2? If I choose "X Zoom Mode"->Fixed and enter
"[INDEX/Max]" to the "to" field it seems to evaluate to some quite small
value.

-Timo