According to previous reports and leaks, windows 10 21h2 codenamed "Sun Valley" will reintroduce the "rounded edge" of Windows 7 / Vista era. In the process of adjusting the aesthetic design, Microsoft is considering designing a new interface for pop-up menus (such as datepicker, TimePicker, etc.). The new version of the pop-up menu will provide an automatic color switching animation effect similar to "X-ray".

Microsoft inGitHub post"This allows us to dynamically switch colors even during scrolling, resulting in a very smooth looking 'X-ray' effect," it wrote.