Adjusting the Level of the Nodes
The Level parameter specifies the amplitude of the selected envelope node.
To set the level of a node, do one of the following:
Select a node and enter a new value in the Level field.
Drag one or multiple selected notes up or down in the graphical editor.
For a higher resolution, hold Shift while moving the nodes.
To limit the movement to the level axis, that is, to change only the vertical position of a node, hold down Alt while dragging.