Apple Logic Pro 9 - Manual (Page 280)

To adjust a parameter slider
Do one of the following:
µ
Drag the slider vertically or horizontally.
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Command-click anywhere in the slider’s value range to set it to the clicked value.
To adjust rotary knobs
Do one of the following:
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Drag the rotary knob vertically.
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Command-click anywhere in the value circle surrounding the knob to set it to the clicked
value.
To adjust numerical fields
Do one of the following:
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Drag the field’s numerical value vertically.
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Click (or double-click) in the numerical field, then type a new value using your computer
keyboard.
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If there are up and down arrows alongside such panels, click them to increment or
decrement the value by one step.
µ
If the numerical panel opens a pop-up menu of values, choose one.
280 Chapter 10 Working with Instruments and Effects