The Merge modes

When you use the parameter VST 3 Volume in the notes and for the dynamics symbols, the result depends on the Merge Mode. The following modes are available:

Average: When this is selected, the average of the two volume messages will be used for the notes.
Merge: When this is selected, the VST 3 Volume setting for the Dynamics symbols modulates the existing VST 3 Volume setting of the notes. Higher settings increase the volume and low settings decrease the volume set for the note.