These are all the changes included with Windows 10 build 17661, 17655, and 17650.
As part of the Redstone 5 development, Microsoft is rolling out Windows 10 build 17661 for PCs enrolled in the Fast ring and the Fast ring using the Skip Ahead option. This new test preview introduces a small set of features and several changes over previous releases, which the company plans to deliver with the second major update expected to come out in 2018.
Windows 10 build 17661 introduces a new snipping experience, Fluent Design tweaks, changes in the Settings app for Focus assist and Sound, improvements to the High Efficiency Image File Format (HEIF) support, minor modifications related to input, and a lot more.
Alongside build 17661, there have been a few other builds released in April, including 17655 and 17650, which were just minor updates, but they also introduce several changes we'll see later in the year.
Full story from the WindowsCentral blog...