How it works
A default tooltip shows the numbers behind one data point. A tooltip page shows the context around it.
In the example, the main chart shows revenue by region. Hovering over EMEA opens a small page filtered to EMEA:
- The value and its comparison: $0.84M in Q3, up 8% on last year’s $0.78M.
- A second measure: margin, 41%.
- The breakdown: revenue by month, $0.26M, $0.28M and $0.30M, which add up to the $0.84M.
The tooltip page itself is built like any report page, with its own KPI cards and charts. Power BI filters it to whatever the reader is hovering over.
Default tooltip vs. tooltip page

Use a tooltip page when the question after “how much?” is always the same, such as “what’s the trend?” or “how does it compare with last year?”. It answers that question without a click, a new page or another chart taking up space on the canvas.
Setting one up in Power BI
- Create the page. Add a page, turn on Allow use as tooltip, and set the canvas size to Tooltip (320 × 240) or a custom small size.
- Build it small. One headline number, one comparison and one small chart is plenty.
- Assign it. On each chart, set Tooltips > Type to Report page and pick the page.
- Hide it. Hide the page so readers don’t land on it as a normal page.
Tooltip pages work on charts, matrix visuals and tables, so hovering a row or cell can show the detail behind it.
Best practices
- Keep it glanceable. It disappears when the cursor moves, so it has a second or two to make its point.
- Answer the next question. Show what readers would otherwise click through to find, not a copy of what’s already on the page.
- Use the same styling. Match the main report’s colours and KPI card design so it reads as part of the page.
- Mind touch screens. Hover doesn’t exist on a phone or tablet, so don’t put anything essential only in a tooltip.
Mocking up tooltip pages
Tooltip pages are easy to forget in a spec, so sketch them next to the page they belong to and agree what they show at the mockup stage. Mockko has a Power BI Tooltip canvas preset for exactly this. See why to mock up Power BI reports before you build.