Double-click a parameter value field to enter a new value. Press Return to complete the operation.
Minus button (—): Highlight the modulator you want to remove, then click the button to delete the modulator from the Modulators pane.
+ LFO button: Add an LFO to the Modulators pane. Up to four LFOs can be used.
Waveform pop-up menu: Choose the LFO waveform. For details about how to use them, see PDF
Logic Pro Instruments: PDF