Windows 10 build 21354

Windows 10 build 21354 is the thirteenth Insider Preview build of Cobalt. This build was released on 7 April 2021 to all Windows Insiders on the Dev Channel as the first from the  branch, where CO stands for the element Cobalt.

Display Settings
Two options to adjust content adaptive brightness control (CABC) preferences have been implemented in the form of checkboxes under the brightness slider in Settings → System → Display labeled as "Change brightness automatically when lighting changes" and "Automatically adjust contrast based on the displayed content to help improve battery". However, and depending on the device's GPU specifications, only one of them might appear.

HDR certification details for high quality HDR displays are now shown under Display → Advanced display settings. This feature is currently only available for select Dolby Vision and VESA DisplayHDR monitors.

Camera Settings
A new dedicated camera settings page has been implemented under the Devices section. It is oriented for use with ONVIF protocol IP cameras and provides basic management functions, such as adding and deleting camera devices and modifying default camera settings.

Feeds (News & Interests) changes
A new feature has been added to the News and Interests (internally dubbed Feeds) UI. This allows the user to select the topics and news agencies that they are interested in.

Other changes

 * Several update-related strings have been changed to be shorter:
 * "Updates are underway to keep things running smoothly" → "Updates are underway".
 * "Please keep your computer on and plugged in" → "Please keep your computer on".
 * Windows Ink Workspace has been renamed to "Pen".
 * The change that moved the touch keyboard, Pen, Search, and Task View taskbar button settings from its right click menu to Settings → Personalization → Taskbar in build 21337 has been reverted.
 * File Explorer is no longer pinned to the taskbar by default in clean installations.

Bugs

 * The update process to this build has a chance of hanging for extended periods of time.
 * Parts of search will not follow the system's dark theme.