The directory allows to extend or modify existing functionality of Zabbix. Files placed here have a priority and are preserved after upgrades.

1. Front-end views and partials

Copy an existing view or partial from app/views or app/partials to local/app/views or local/app/partials. Modify it. Done.

2. Front-end Controllers

Copy an existing controller from app/controllers to local/app/controllers. Modify it. Done.