Thanks for your inquiry.
You can set XyDirection property to XDirection for the ZoomPanModifier to avoid zooming on YAxis.
Please let me know if this helps.
We have also noticed you use an outdated SciChart version. We recommend using the latest one, which is SciChart v6.4 currently.
It has a lot of improvements since previous versions and SciChart v5.x is no longer supported.
With best regards,
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