In the documentation on screens (https://www.zabbix.com/documentation/3.0/manual/config/visualisation/screens) there is no mention of templated screens.

The following should be included:

• What are the advantages of using templated screens
• How to create templated screens
• Possibility of screens for LLD graph prototypes
• How to find these screens in the frontend (as they don't show up in 'Monitoring -> Screens'.

It could be that some of this info is already scattered throughout the documentation. In that case don't duplicate the documentation, but bring it together in a central location.