Win10 how to open or close the taskbar small triangle icon

Win10 system taskbar placed in the lower right corner of the QQ icon, speaker, time, date and other daily common procedures, if too many programs will hide some icons, click on the small triangle to see hidden program. If a user doesn't want to hide anything, how do I disable or turn on the small triangle?
1. Right click on the taskbar and select Properties;

2, Open “Taskbar and Start Menu”Setup Panel ;
3. Click on the "Customize" button in the notification area;

4. Check or uncheck "Always show all icons and notifications on the taskbar" to enable or disable small triangles. Features.

The triangle in the lower right corner of the Win10 taskbar is enabled by default, hiding some running programs. If you close it, it will not hide the icons and notifications for the user to view. Of course, this requires a hands-on setup.