Use case

https://potix.freshdesk.com/helpdesk/tickets/4789
There is a multiline textbox working like a light weight text editor. Users can click a button to insert predefined keyword at the current cursor positoin, e.g. SQL keyword

Benefit

this feature enables developers to create their own light-weight editor with a Textbox e.g. github issue tracker comment editor

prototype

see the attached zul