Eye Control and Accessibility. Eye Control features more improvements to mouse options including drag and drop, Switch support for input devices, and Eye Control settings. There are also improvements to Narrator which will automatically start reading webpages and emails. Also, the Magnifier UI works with the Windows 10 Dark Theme.

Notifications. Microsoft is refining notifications settings with this build. Currently, you can enable the Focus Assist feature. But with this build, the company is making it easier to use. There is now an inline option directly on your notifications, more options in Notification settings, and a direct link to Notifications settings in Action Center.

Your Phone app. New features to the Your Phone app are included in this build. They include additional features for “Phone screen”, touch functionality, and notification integration with the Phone screen. This will allow the ability to interact with notifications from your Android phone directly on your PC.

In addition to the new features above, here is the list of other changes and improvements included in this build:

We’re in the process of converging settings sync engines to reduce complexity and improve reliability of sync. As of today, the older settings sync engine will be turned off for 20H1 builds and changes made to settings that have not yet been migrated to the new settings sync engine will stop being sent and received until that work is complete. Some settings may not be migrated. The full list of settings that have been supported for sync are available here, but the list is subject to change during 20H1. Synced settings that are impacted by this change include settings pertaining to taskbar orientation, wallpaper, theming, and others. If there’s a setting you’d like to particularly be prioritized as we work on this, please let us know. Please note, you may notice a one-time receival of synced settings changes after you upgrade or reset your PC, but after that it will stop.We’ve updated our indexing behavior to exclude common developer folders, such as .git, .hg, .svn, .Nuget, and more by default. This will improve system performance while compiling and syncing large code bases in the default indexed locations such as user libraries.We fixed an issue where the update might have failed the first time you tried to download it with a 0xc0000409 error code.We fixed an issue where recent updates might have failed with a 0x80070005 error code.We fixed an issue for Home editions where some devices couldn’t see the “download progress %” change on the Windows Update page.We fixed a race condition resulting in some Insiders seeing a large number of explorer.exe crashes in recent builds. This is also believed to be the root cause for some Insiders finding that Control Panel wasn’t launching – please let us know if you continue seeing issues after upgrading to this build.We fixed an issue resulting in some Insiders finding that their File Explorer search box was rendering in an unexpectedly small space and crashed when clicked.We fixed an issue where Settings would crash if you tried to add a language on the previous build.In Word, after showing a “flash message” on a braille display, Narrator is now correctly showing just the current heading.We made a small backend change to the updated Windows Ink Workspace to help improve the launch time.We fixed an issue resulting in Task Manager unexpectedly showing 0% CPU usage in the Performance tab.We fixed an issue that could result in a black remote desktop window for a few seconds when disconnecting from a remote desktop session.We fixed a issue resulting in Direct3D 12 games crashing in the previous flight.We fixed an issue that could cause certain apps to crash when you input Asian characters.We fixed an issue for the Chinese Pinyin IME where, if you were in the middle of finalizing a phrase and clicked away, the next thing you typed wouldn’t show the characters.We fixed an issue with the Chinese Pinyin IME where the mouse over highlight could get stuck on a particular candidate in the candidate window.We fixed an issue with the Chinese Pinyin IME where the candidate window wouldn’t display when typing in the Microsoft Edge search box (Ctrl+F).We fixed an issue resulting in not being able to use touch to open context menus on websites in Microsoft Edge after using pinch to zoom in and back out.Narrator search mode will now reset scoping to all elements each time it is opened.The data looks good, so we’re now rolling out the fix for taskbar unexpectedly dismissing when invoking Start if set to autohide to all Insiders in Fast.We fixed an issue where the Bluetooth Hands-Free audio driver (bthhfaud.sys) could get stuck when making or breaking a synchronous connection-oriented (SCO) link to the headset. This would cause all audio on the system to stop working until the system was rebooted.

Remember, 20H1 is the Insider build that is the feature update expected for Spring of 2020. Microsoft this week announced that 19H2 will basically be a service pack and is coming this September. So, you can expect a lot of bugs and issues for both users and developers. Make sure to read Microsoft’s full blog post for all changes, known issues, and workarounds.