Thanks for the update.Query 1: Is it possible to have the HorizontalLineAnnotation in Background?
We would like to let you know that by default, Annotations are placed on the top of the series. However we have achieved your requirement in a workaround by overriding the SfChart and placed the annotation canvas in the bottom of the chart. Query 2: I would like to have the Axis Labels of the vertical axis on the left side of the chart and the AxisLabel of the HorizontalLineAnnotation on the right side
We are not having the direct API to display AxisLabels of Annotation in the opposite position of ChartAxis (i.e., right side). Alternatively, we have defined two YAxis to display the axis label of annotation in right side. Query 3: Is this possible by editing the AxisLabel of the HorizontalLineAnnotation Data Template?
We are able to customize the AxisLabel of the Annotation by using “AxisLabelTemplate”.
We have modified the sample based on your requirements and it can be downloaded from the below location.Sample: StriplineSample.zip
Please refer the below link for more information of AnnotationsLink: http://help.syncfusion.com/ug/wpf/Documents/annotations.htm
Please let us know if you need any further assistance on this.