https://www.zabbix.com/documentation/3.0/manual/acknowledges#display talks about places where ack status is displayed and filtering is available.

it is missing information about map and dashboard filtering and displaying when the filter is used.

it also says "Acknowledgment status is also used with the screen filtering options.", but that seems to be about monitoring -> triggers page. usage of the word "screen" is confusing here, as it is a zabbix entity.