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Attach Data Labels to Top Y axis and Auto Position
On By default on Labels tab, user can attach Data Labels to a Horizontal Line (Y line), Vertical Line (X line) instead of to data point . The data Labels will be attached to Data. But user can set "Attach to" to a stragith Y line, X line and auto reposition in the other direction to avoid overlapping. Leader Line can be set to Polyline type.
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