Hide or edit individual legend items

In Power BI, achieving this type of legend customization can be challenging, as there's no direct way to remove or change the color indicator in the legend for conditional formatting. However, here are some workarounds to achieve a similar effect:

Option 1: Separate Legends with Text Boxes
1. Turn off the Legend: In the Visualizations pane, go to the "Format" section, find the "Legend" option, and toggle it off.

2. Add Custom Text Boxes for Legends: Create a text box for each legend item you want to display. For example, add a text box labeled "Net Activity" and another labeled "Daily Average."

3. Add Indicators Manually: You can use shapes (such as circles or squares) or images in Power BI to create custom color indicators next to the text boxes, if desired. Set the color for each shape to represent the corresponding measure.

Option 2: Create a Custom Legend in Power BI Desktop
1. Create a Custom Legend Table: In Power BI, you can create a separate table that contains the legend items you need, with columns for the name and color.

2. Use a Card or Multi-row Card Visual: Display this table using a Card or Multi-row Card visual and place it above or near the chart to serve as a custom legend. This lets you format colors or icons as desired without altering the chart itself.

Option 3: Use a Secondary Chart for Legend
1. Duplicate the Chart for Legend Purposes: Create a duplicate of your chart, but only display the "Daily Average" line in this duplicate.

2. Overlay or Position the Chart Legend: Turn on the legend for this secondary chart and position it to align with your main chart. This way, only the "Daily Average" legend appears on the duplicated chart while hiding the "Net Activity" legend item.