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Explain what Auto y-axis range actually does in chart config - #1548

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Oct 23, 2026
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The Axes section of the chart configuration docs said you could "keep the default auto y-axis range" but never explained what that auto range actually does, so readers assumed turning it on would always zoom the axis in on their data.

Adds a short "Auto y-axis range" subsection explaining the real rule: auto range only drops 0 as the axis minimum when the lowest value is more than 3 times the spread between the lowest and highest values. Data sitting closer to 0 relative to its spread keeps 0 as the minimum even with auto on — for example, percentages ranging roughly between 30% and 80% still start at 0. The same rule applies to the maximum for entirely negative data. The new text also notes this only applies to line, area, and scatter axes (bar axes always start at 0), and points readers to the manual Min/Max fields as the way to force a narrower range.


A teammate answered a support question that the docs should have covered. Written by Cloudy's docs writer; a teammate reviews it before merge, and edits are welcome.

@lightdash-bot lightdash-bot added the cloudy-needs-review Created by Cloudy; human review is outstanding label Oct 23, 2026
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jpetey75 merged commit 18bd82b into main Oct 23, 2026
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jpetey75 deleted the cloudy/docs-explain-what-auto-y-axis-range-actually-does-in-ch-097fee9e branch October 23, 2026 16:10

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