In the past years Zabbix removed at various places those small 'add' buttons that you always forget to click before updating something.

However at a few places it's still available, and still adding frustration to the configuration process while doing harm to the user experience.

Few places from top of my head where they are present: Users -> User groups -> {usergroup} -> Template permissions and Host permissions:

Map element Trigger:

And probably more.

Zabbix automatically should add the elements there, no "hidden" add buttons that make you do the configuration twice.