Microsoft has quietly ported two of OneNote’s most expressive digital inking tools—the Fountain pen and Brush pen—into Word, Excel, and PowerPoint for Windows, giving users a more natural, pressure-sensitive handwriting and annotation experience across the core Microsoft 365 productivity suite. The rollout, which began in August 2025 with Version 2508 (Build 19127.20000 or later), brings speed- and tilt-aware strokes that mimic real pen-and-brush behaviors, turning the Draw tab into a far more capable creative space.

The Ink That Started in OneNote

The Fountain pen and Brush pen first appeared in OneNote for Windows in October 2024 as an Insider feature. The response was immediate and positive—OneNote users loved how the Fountain pen’s line width responded to writing speed and pressure, while the Brush pen’s directional thickening made quick headings and artistic flourishes effortless. Now, Microsoft has decided that the same natural inking belongs inside the apps where most people actually annotate, review, and sketch: Word, Excel, and PowerPoint.

What Makes These Pens Different

Digital pens in Office have traditionally delivered uniform, vector-perfect strokes. That clinical precision has its place, but it can feel cold and impersonal—especially for longhand notes, quick feedback, or any task where the human touch matters. The Fountain pen and Brush pen change that.

Fountain Pen: Speed and Pressure at Work

The Fountain pen is designed to behave like a classic nib pen. Write slowly and lightly, and you get a fine, delicate line. Increase your speed or press harder, and the stroke becomes bolder. It’s ideal for tidy handwritten notes, detailed lettering, and annotation that needs to feel personal. Because it respects pressure sensitivity (on compatible styluses and digitizers), it finally lets digital ink flow with the nuance of a real pen.

Brush Pen: Direction Gives It Character

The Brush pen takes expressiveness a step further. Stroke thickness changes automatically based on the angle of your movement—sweeping curves grow thicker, while straight lines stay crisp. It’s built for quick flourishes, bold headings, and visual emphasis that would otherwise require switching to a drawing app. No custom brush settings needed; just pick it up and let the direction do the work.

Both pens support full color customization and thickness presets. Users can even duplicate a pen in the Draw toolbox to keep multiple pre-configured versions—say, a blue fountain pen for notes and a red one for corrections—without constantly fiddling with settings.

How to Add the Pens to Your Draw Tab

If you’re running a compatible Windows build of Word, Excel, or PowerPoint, the new pens don’t always appear automatically. Here’s the step-by-step:

  • Open any of the three apps (Version 2508 / Build 19127.20000 or later).
  • Click the Draw tab on the ribbon.
  • Look for the Add (+) button at the end of the drawing tools gallery.
  • Select Add and choose Fountain pen or Brush pen (or both).
  • Drag the pen icon left or right in the gallery to reposition it for faster access.
  • To remove a pen, right-click it and pick Delete, or expand its options and choose Delete Tool.
  • To set custom colors, click the pen, then More Colors or use the Eyedropper to sample ink directly from the document.

Pro tip: Add multiple copies of the same pen with different presets (for instance, two highlighters in distinct colors) to avoid breaking your flow mid-task.

A Windows-First, Hardware-Dependent Reality

Microsoft’s official support documentation is explicit: the Fountain pen and Brush pen are “currently available only on the Windows platform.” This isn’t just about the operating system—it’s also about the hardware. To get the full speed, pressure, and tilt effects, you need a stylus and digitizer that support those capabilities. Surface Pens and other MPP (Microsoft Pen Protocol) devices work best. Wacom-enabled tablets and 2-in-1s that expose tilt data also qualify, but cheaper passive styluses will only produce flat, unvarying strokes.

If you’re on macOS, iPadOS, or Android, you won’t see these pen types in OneNote, Word, Excel, or PowerPoint. Those platforms offer their own inking features—trackpad sketching on Mac, Apple Pencil Scribble on iPad—but they are fundamentally different implementations. Microsoft hasn’t published a roadmap for bringing the Fountain and Brush pens to other operating systems, so cross-platform teams should plan accordingly.

Why This Matters for Different Users

Students and Educators

Handwriting promotes memory retention, and more natural digital ink makes it easier to adopt paperless note-taking. The Fountain pen is perfect for structured class notes; the Brush pen adds instant visual hierarchy to headings and diagrams. Teachers who grade papers or annotate slides in PowerPoint and Excel now have a more expressive markup toolkit, and the ink feels less like “computer writing” and more like a real pen.

Creatives and Designers

Quick mockups, concept sketches, and visual feedback often happen inside Office documents. With the Brush pen, you can draw attention to a chart in Excel or sketch a layout directly on a PowerPoint slide without leaving the app. The pens aren’t a replacement for full illustration suites—they lack advanced vector controls, layers, and custom brush engines—but for fast, fluid annotation, they eliminate the need to round-trip through a drawing program.

Enterprise and IT Administrators

The feature is tied to a specific build number, so organizations that control updates must ensure clients are on Version 2508 or later. A short adoption guide for employees can reduce help desk calls, especially since the Draw tab customization can look daunting at first. IT should also validate that the fleet’s pens and touchscreens actually deliver pressure and tilt data; without them, the new pen behavior won’t materialize.

Customization: Making the Draw Tab Work for You

Before this update, the Draw tab could feel cluttered. Microsoft addressed that by letting users add, remove, and reorder drawing tools. You can now strip the toolbar down to just your essential pens and highlighters, and arrange them so the most-used tools are always one click away. Duplicating a pen with different color presets is especially useful for reviewing—imagine a green fountain pen for grammar fixes and a purple one for content suggestions, both right next to each other.

Performance and Compatibility Pitfalls

Complex inking can tax older machines. The Fountain and Brush pens rely on real-time pressure and tilt data processing, so devices with limited GPU acceleration or older integrated graphics might show perceptible latency or stuttering. If you experience lag, try simplifying the ink toolbar or closing background apps that compete for graphics resources.

Stylus quality also matters enormously. The difference between a Surface Slim Pen and a generic capacitive stylus is night and day. If your pen doesn’t support tilt and pressure (or the driver doesn’t expose them correctly), the Fountain pen will behave like a plain felt-tip marker, and the Brush pen’s directional magic will be lost.

What Microsoft Should Do Next

The Windows-centric rollout is a logical first step, but it leaves a gaping hole for anyone who splits work across a Surface and an iPad, or between a Windows desktop and a MacBook. Microsoft would do well to publish a clear cross-platform inking roadmap. Power users would also appreciate more granular controls—smoothing, pressure curves, tilt intensity—while keeping the one-click simplicity for casual users. And a hardware compatibility matrix would save everyone the trial-and-error of finding out whether their particular stylus/digitizer combo actually works.

Conclusion

Bringing OneNote’s fan-favorite Fountain and Brush pens to Word, Excel, and PowerPoint is a small but meaningful evolution. It makes handwriting inside Microsoft 365 feel more like the real thing, adds expressive punch to annotations, and removes one more reason to leave the Office ecosystem for basic drawing tasks. The feature is live now for Windows users on the latest builds, complete with Draw-tab customization that puts users in control. Just remember: great inking demands great hardware. If you’re on a Surface device with a proper pen, dive in and enjoy the newfound fluidity. If you’re on other platforms, keep your expectations in check until Microsoft signals that this experience is going truly cross-platform.