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# Windows 10 build 19546 is now available in the Fast ring

Microsoft has released build 19546 of Windows 10 to Insiders in the Fast ring, a little behind its usual schedule. As has been the case with many of the recent builds, there isn't a whole lot that's new in this release.

In fact, none of the new things noted in today's blog post are necessarily exclusive to today's build. The Calculator app now includes a graphing mode, something Microsoft announced to be coming to the general public in the summer, and there's also a new Indexer Diagnostics app, which helps users identify issues with the Windows Search indexer.

### Introducing Graphing Mode in Windows Calculator

Today, we’re updating Windows Calculator for Insiders with a preview of our new graphing mode. Adding support for graphing is one of our top feature requests in Feedback Hub, and we’re excited to bring this feature to our users. Graphing capabilities are also essential for students who are beginning to explore linear algebra. With this feature, we hope to empower students to learn mathematics by improving their conceptual understanding and attitudes towards math.

Here are a few things you can try out with this new feature:

• Plot one or more equations on the graph. Enter multiple equations so that you can compare plots against each other and see interactions between the lines. You can also customize the line style and graph viewing window to suit your needs.
• Add equations with variables. If you enter an equation with a secondary variable (e.g., “y = mx + b”), you’ll be able to easily manipulate those variables so that you can quickly understand how changes to the equation affect the graph.

• Analyze the graph. Trace plots with your mouse or keyboard to better understand the relationship between variables in the equation on the graph. You can also analyze equations to help identify key graph features, like the x- and y- intercepts.

We’re looking for feedback! Tell us what you want to see next via the Feedback Hub under Apps > Calculator or select the Send feedback button on the About page in the app. If you’re a developer, check out the project on GitHub—we are always accepting contributions! #BuildTogether

Introducing the Indexer Diagnostics app

Available now in beta via the Microsoft Store, the Indexer Diagnostics app was created to help enhance your understanding of the capabilities of search, as well as increase the troubleshooting ability and support for general Windows Search issues.

The tool will continue to be improved with more functionality added over time—as always, appreciate your feedback! The app is available for anyone running Windows 10 version 1809 or higher.

Fast ring builds have only recently been spun off from the current development cycle for the 20H1 update, so new features may take some time to show up. Since the Fast ring is no longer attached to a specific Windows 10 release, though, new features might show up more often, though they won't necessarily make their way to the next feature update.