Logic Pro 9 User Manual - Help Library - Apple

Don’t worry about choosing the wrong fader style or type from the New menu; you have
complete control of a fader’s style and type via the Object Parameter box.
Using Faders
Normally, you grab the surface of a fader and drag it vertically or horizontally, depending
on its style. When using the fader itself as a slider, you may notice that values jump in
larger increments, depending on the size of the fader and dragging speed. You can also
change values in single steps by dragging the slider or knob while holding down the
Control key.
Some of the fader styles have numerical displays. In these cases, double-click in the
numerical field and enter a value. When you drag any of the sliders or knobs, the series
of values that are sent out depends on the fader size and scrolling speed—not every
consecutive value is sent out at smaller sizes. If you drag slowly in the numerical field,
however, you will send consecutive values.
Knobs can be dragged either vertically or horizontally.
Buttons only send two values, the lowest and highest of their range set in the Object
Parameter box. You change a button’s state by clicking it.
The default appearance of the text fader is like a value field that can be scrolled.
Double-click to open a window that allows you to enter text for each menu position.
Select the Behaves as Menu checkbox to use the text fader as a pop-up menu.
A vector fader allows you to scroll in two directions, and sends out two values: one
corresponding to the vertical position, and the other to the horizontal position.
Recording and Playback of Fader Movements
As with the channel strips in the Mixer, you can record fader object movements to tracks,
and play them back.
1100 Chapter 37 Environment Objects Reference