All charts by default have blue outer line/border that appears round all graphs/charts. You can remove them under chart_background node in chart_settings using simple XML configuration:
<anychart>
<charts>
<chart plot_type="CategorizedVertical">
<chart_settings>
<chart_background enabled="false"/>
</chart_settings>
<data>
<series>
<point name="A" y="2"/>
<point name="B" y="1"/>
<point name="C" y="3"/>
</series>
</data>
</chart>
</charts>
</anychart>
This sample removes not only border, but the background itself, you can leave the background fill and alter the border color and corner shapes, see more at:
