10.6

137Control Surfaces Support Guide
Control Assignment
22 (Tool: Xfade) Selects the Crossfade tool.
23 (Tool: Marque) Selects the Marquee tool.
24 (Tool: Autom.) Selects the Automation Select tool.
V-Pot 25 (WfZoom) Edits the waveform zoom factor (if the main window has key focus).
V-Pot 26 (V.Zoom) Edits the vertical zoom factor of the window with key focus.
V-Pot 27 (H.Zoom) Edits the horizontal zoom factor of the window with key focus.
V-Pot 28 (Move Cycle) Moves the cycle locators.
V-Pot 29 (Quantz) Chooses the Quantize value. V-Select 29 performs Quantize Selected
Events for the selected regions or events.
V-Pot 30 (Division) Chooses the division value for clock display.
V-Select 31 (Prev SetEXS) Performs Next Plug-in Setting or EXS Instrument key command.
V-Select 32 (Next SetEXS) Performs Previous Plug-in Setting or EXS Instrument key command.
Mackie C4 modifier buttons in Logic Pro
The four buttons in this area are similar to those found on your computer keyboard (but are
independent of the keyboard modifiers). Many Logic Pro functions behave differently when
one or more modifier keys are pressed in conjunction with another key or mouse click. This
also applies to the C4 control surface.
Here is a generic description of the modifier button functions:
• SHIFT: Switches other buttons to an alternate function.
• OPTION: While held down, parameters are set to the minimum, default, or maximum
value when edited with a V-Pot.
• CTRL: Disables the Group function.
• CMD/ALT: While held down, parameters are edited in Fine (high-resolution) mode when
a V-Pot is turned.