The tool needs the ability to add servers/databases to the diagrams including database triggers.
Data Modeler does have support for table triggers, they are found inside "Triggers" tab at table editor.
However, the purpose of Data Modeler is modeling the tables and objects of a single database. For now, the product doest not provide any feature to manage servers, databases, forms, etc.
TMS Software Team
Firebird has triggers on the database itself - on connect, on disconnect, on transaction start/commit/rollback etc.