Reference Line

A Reference Line is a visual guide that helps highlight key values or thresholds on a chart, such as an average, minimum, or target value. It allows you to draw attention to important points within your data and make comparisons easier for report viewers.

You can add one or multiple reference lines to most chart types in Wyn to provide contextual insights — for example, marking the average sales value or a target quota line across a column or bar chart.

Adding a Reference Line

Select the chart on your report canvas.
Once the chart is selected, a set of action buttons appears on the right-hand side of the visualization.
Click the Reference Line button.
This opens the Reference Line window, where you can configure the properties of your reference line.

Reference Line Properties

Below is a description of each property available in the Reference Line window:

Name

You can give your reference line a custom name.

This name can optionally be displayed on the chart (see the Text property below).

By default, if you don’t enter a name, the name will match the selected line type (for example, Average Line or Max Line).

Show Name

Enable or disable whether the reference line name is displayed below the line.

Type

Choose the type of reference line you want to display.

From the dropdown, you can select from several predefined line types:

Constant Line – A line fixed at a specific value.
Max Line – Displays a line at the maximum value in the dataset.
Min Line – Displays a line at the minimum value.
Median Line – Displays a line at the median value.
Average Line – Displays a line at the average value.
Count Line – Displays a line representing the total count of data points.
Percentile Line – Displays a line at a specific percentile (for example, the 90th percentile).

Line Style

Defines the appearance of the line itself.

The default style is dashed, but you can change it to solid from the dropdown.

Scope

Determines the range of data that the reference line applies to.

There are three scope options:

Total – The reference line is calculated across all data in the chart.
Group – The reference line is calculated separately for each group or category (for example, a line per region or per product category).
Trellis Cell – Applies when using a Trellis chart (a grid of small multiples). The reference line is calculated and displayed separately within each trellis cell.

Line Width

Specifies the thickness of the reference line. Enter a numeric value to increase or decrease the width.

Line Color

Choose a color for the line using the color picker.

Text

Determines what label appears with the reference line.

You can choose from:

None – No text displayed.
Name – Displays only the reference line’s name.
Name and Value – Displays both the name and the calculated value.

Position

Sets where the label (name or name and value) appears relative to the chart.

Available positions include:

Top Left
Top Center
Top Right
Bottom Left
Bottom Center
Bottom Right

Font Style

Customize the appearance of the label text, including its color, weight (bold/regular), and font style.

Example

Here is an example of a Reference Line added to a chart created using the Adventure Works data source.

After creating the chart, select it, click the Reference Line action button, and set the following:

Type: Average Line
Scope: Total
Line Style: Dashed
Line Color: Blue
Text: Name and Value
Position: Top Left

This adds an average sales line across the chart, allowing you to visually compare how each value relates to the overall average.