Power BI August 2026: The New Visual & Report Design Features

If you build reports for a living, the Power BI August 2026 update is one to pay attention to. A large set of visualization features graduated to Generally Available this month — the kind of small, practical improvements that make a dashboard look intentional rather than templated. Here is the report-design side of the release, and why each one matters.

Modern visual defaults & the Theme pane (GA)

The headline for report designers: modern visual defaults and the customizable Theme pane are now Generally Available. New reports start on Microsoft’s Fluent 2 base theme, and the Theme pane lets you set a base theme, adjust colour palettes, change text styles, set visual and page properties, and import or export custom themes — in Desktop or on the web. Crucially, font overrides were removed from the base theme, so the Text section now applies consistently across every visual. If you have ever hand-formatted fonts on twenty visuals one by one, this is the fix. Setting a house theme once is exactly the discipline we teach in the Power BI Report Design Masterclass.

Date picker for the slicer visual (GA)

The slicer date picker is now GA. It supports relative selections that roll forward with time (so “last 30 days” stays current), a calendar, and a slider for manual date-range or single-date selection. A new Single date setting under Slicer settings restricts the slicer to one date at a time, and selections can be cleared from a header icon. It is a much cleaner date experience than stacking multiple slicers.

Center value for donut charts (GA)

Donut charts can now display a value in the center — without overlaying a separate card visual on top. You configure the value format, display units, font, optional labels, images and background right in the formatting pane, and the center value updates automatically with filtering, cross-highlighting, drill-down and slice selection. One less hacky workaround, one cleaner visual.

Outer padding for charts (GA)

A new Outer padding setting (under Layout) controls the space between the plot-area edges and the first and last categories — for bar, column, line, ribbon and waterfall charts. Set it to 0%, combine with Space between categories at 0%, and the chart fills the plot area edge to edge. It sounds minor; it is the difference between a chart that looks “designed” and one that looks like a default.

Matrix: expand/collapse columns & freeze headers (GA)

The matrix visual now supports expand and collapse on column headers (via +/− icons when you have more than one field in Columns), with customizable icon colour and size. Report authors can also set a default freeze state for row headers in the format pane, saved with the report. Big, wide matrices just became a lot more usable.

Slicer dropdown formatting (GA)

A new Dropdown section in the slicer formatting pane adds controls for dropdown border colour, rounded corners, and open-icon colour and transparency, plus an accent-bar option — and a new Hierarchy section lets you colour the expand and collapse icons for hierarchy slicers. More of the styling you used to fake now lives in the pane.

OneLake image URLs in visuals (GA)

Images stored in OneLake can now be used as image sources in the image visual, table and matrix cells, the card visual, button and list slicers, and custom icons — and reference-layer and shape-map files can be linked from OneLake too, with Power BI authenticating on the viewer’s behalf. For teams already on Microsoft Fabric, it is a clean way to bring governed images into reports.

Azure Maps improvements (GA)

Azure Maps reference-layer shape matching now renders faster, and interactions like filtering, cross-highlighting and zoom respond more smoothly — with no configuration change required. When you filter to a smaller data set, the visual also reloads to include points beyond the initial 30,000-point limit and auto-zooms to the filtered area.

See the visuals in action

Why this release matters for report builders

Individually these are small settings. Together they close a lot of the gap between a native Power BI report and a polished, custom-looking one — without SVG or Deneb. The Theme pane in particular rewards teams that treat design as a system rather than per-report formatting.

For the full month — modeling, Copilot, mobile and developer updates — see our complete Power BI August 2026 update.

Source: Microsoft — What’s new in Power BI, August 2026.