Microsoft today released a new Windows 10 preview for PCs with gaming, privacy, graphics, Eye Control, security, Bluetooth, Edge, and input improvements. This build is part of the RS4 branch, which represents the next Windows 10 update the company has yet to announce (but is likely to ship soon).

Windows 10 is a service, meaning it was built in a very different way from its predecessors so it can be regularly updated with not just fixes, but new features, too. Microsoft has released four major updates so far: November Update, Anniversary Update, Creators Update, and Fall Creators Update.

First up, the Game bar has received another makeover. There are now new buttons that let you access your captures, toggle your microphone and camera, and edit the title of your Mixer stream. There’s a new clock, choice of theme (Dark, Light, or your current Windows theme), and a promise that the settings are easier to use.

The Diagnostic Data Viewer that showed up in the last build now lets you delete the Windows Diagnostic Data that Microsoft has collected from your device. Just head to Settings => Privacy => Diagnostics & feedback, and hit the delete button.

The Privacy Settings navigation pane has gained new categories. There’s also a new section to Speech, Inking, & Typing settings under Privacy so that you can view and clear your user dictionary.

HDR video access has been expanded to more users (Settings => Apps => Video playback => Stream HDR video). There is also an experimental calibration tool — “Change calibration settings for HDR video on my built-in display” — that lets you change the…