The
MIDI... option at the bottom of a MIDI track Edit Filter Automation section calls a dialog similar to the Controller Pane Edit Filter drop down in the PRV. Once the data is written to the automation lane, it may be used by any plug-in using the MIDI track as an input. If it is the basis of a "learned" control and the plug-in forgets the setting somehow, it can always be re-learned. If the data is no longer needed, delete the envelop and the data is no longer in the project.