Apple MainStage 2 - Manual (Page 71)

4 To map the screen control to a plug-in parameter, double-click the plug-in in the Inserts
section of the channel strip to open the plug-in window, then click the parameter in the
plug-in window.
Click the parameter in
a channel strip or
plug-in window.
Click the screen control
you want to map to a
parameter.
The screen control is mapped to the selected parameter, and the Unmapped tab takes
the name of the parameter. You can continue mapping additional screen controls by
clicking them in the workspace and then clicking the corresponding parameters in a
channel strip or plug-in window.
5 When you are finished, press Command-L again (or click the Map Parameter button) to
turn off mapping.
To map a screen control using the Parameter Mapping browser
1 In the workspace, click the screen control you want to map.
The screen control is highlighted in blue. The Screen Control Inspector appears below
the workspace, showing the parameters for the selected screen control. The Screen Control
Inspector includes General and Mapping tabs as well as a tab labeled Unmapped.
71 Chapter 5 Working in Edit Mode