Win10 Build 9901Modern design language how to change

Win10 Build 9901 leaked, users were surprised to find that the Win10 9901 has completely updated the Modern design language, completely different from Win10 Build 9879. Let's take a look at the changes in the Build 9901 in the Modern design language.

In the Win10 preview version 9901, a new set of icons that are completely different from the previous versions appeared. As shown in the figure above, these new icons are designed to be white, replacing the previous gray design, and the new icons look More slender, without any color fill, a bit like the icon on WP8.1.
The appearance of the "minimize" "maximize" & "close" icons in the image below has also been changed. In the image below, the upper blue title bar is the previous icon style, and the black bottom title bar below is the latest icon style.

Modern in Windows, first known as Metro. Microsoft uses Modern UI to call Windows' new start-up interface style.