Hi William ,
This happens because there is not enough space available, which leads to overlapping the label with the bar item. In order to avoid that, disable Y-Axis AutoScale
property and manually set Min, Max and Step values. This way you can control how high the axis would be, therefore there will be enough space for the label to be drawn outside so no overlapping will appear.
More about axes and labels can be found here:
the Telerik team
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