You can use this custom analytics scenario when you need to expose all advanced settings to customize the configuration to suit the specific situation that is not covered by the predefined scenarios.
Area settings
When using a custom Intrusion Detector scenario, you can define an area to consist of
an alarm region, or of a source region, a transport region, and an alarm
region.
NOTE: If you define a multi-region area, you do not need to define
paths.
The following image shows a configuration for a custom Intrusion Detector
scenario: