The following example will take you through how to add a static reference line to a BI column or bar chart.
NB: This cannot be added to an Auto Chart.
1. Once a chart has been created, navigate to the Axis settings from the top menu;
2. Click the Vertical Axis;
3. Open the Scale menu.
Add a Value where the line will sit on the chart, change the colour of the line and add a label to be displayed. ie 'Target', 'Industry Average';
NB: If you would like to add more lines, click + Add Item to add additional reference lines.
4. Close the menu and your chart will update with the reference line.