5

Source Well
Many effects in Motion apply specific parameters from one object to another. For example,
the Bump Map filter applies texture from object A to object B. The Orbit Around behavior
causes object C to circle around object D. You set these object relationships using a
control known as a source well (sometimes called an Image well). A source well is an empty
box into which you drag a source object to influence a target object.
To use a source well
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Drag an object from the File Browser, Library, Layers list, or Media list into the empty box.
The name and a thumbnail of the source object appears in the well and is used as a source
for the effect.
To replace the contents of a source well
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Drag an object onto the well.
The old source is replaced with the new one.
To clear a source well
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Drag the icon in the well out.
The well is emptied.
Color Controls
Many objects and effects in Motion have adjustable color attributes. You can modify color
parameters using a few standard controls, including the color well, pop-up color palette,
Mac OS X Colors window, eyedropper, and color channel sliders.
Color Well
A color well is the small color box you click to open the Mac OS X Colors window to choose
a new color for the selected object. The color well has two parts: a color swatch that
displays the currently applied color and a downward arrow.
To change the color of an object using a color well
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Click the swatch, then pick a color from the Mac OS X Colors window. For more information,
see The Colors Window.
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Click the color well’s downward arrow or control-click the color well, then pick a color
from the Motion pop-up color palette.
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Click the eyedropper, then click an object of the desired color in the Canvas.
129Chapter 3 User Interface Controls