Currently, the PowerBI client does not natively support adding subtitles directly within visuals. However, you can create a similar effect by using a few workarounds within Power BI or with the PowerBI client.
- Title Customization: Adjust the visual's title to include extra information. Separating the main title and subtitle with a separator like a colon or a dash (e.g., "Main Title—Subtitle") simulates a subtitle in the title area.
- Text Box Overlay: If you need more precise formatting or positioning, consider using a text box overlay in Power BI. Create a text box containing your subtitle and position it above or near the visual to act as a subtitle. Though not natively integrated within the visual, it provides flexibility in styling and positioning.
- Custom Visual Development: For projects with specific needs, creating a custom visual in Power BI allows complete control over visual components, including subtitles.
These approaches let you add context to visuals while using the existing Power BI-client functionality.