Draw multiple series

[mahdiye-imanpanah]

Hi guys
I'm using Livecharts(wpf) to draw a CartesianChart with more than 10 LineSeries.
I have to draw all of the series vertically on top of each other vertically, I read all the samples and documentation in your repository but could not find the right solution.
There was a Mapping property that was the closet option I guess,
this is the way I used it:
Mapping = (logPoint, index) => new(logPoint.X, logPoint.Y + 100 ),
However, when hovering over the chart, the values are the sum of Y and 100.
I want to see the original value not the mapped one.
How can I achieve this goal???

I attached the output to this issue.