To visualize triggers from an LSL (LabStreamingLayer) stream, the stream must contain one of the following words in its name/type:
"marker", "markers", "event", "events", "trigger", "triggers".
If an LSL stream is selected in the recording setup, it will get recorded either way. No matter the name of the stream. The naming convention above applies only if you want to visualize external triggers in mbtStreamer.
If you're still having trouble, send us an email to support@mbraintrain.com