Whenever we post screenshots from new Windows 10 build, the most common comment would be on toggle button design. Microsoft is experimenting with many toggle button designs for Windows 10. Instead of a rectangle design in Windows 8, Microsoft is opting for a curved design. In the Windows 10 Build 10108 spotted at IGNITE event, a new toggle button design was spotted. The toggle buttons are now filled with theme color instead of white. Take a look at the new design above and old design below.