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ppi, but you have some control over the pixel grid position. Choose View > Pixel Preview, then
observe the results if you move or transform artwork: Objects snap to an invisible 72-ppi pixel
grid. While this helps avoid anti-aliasing at the top and left edges of artwork, you may wish to
reposition the artwork without snapping to the grid. To do this, choose View > Snap to Pixel to
deselect that option.
Pixel Preview does not help you judge how Illustrator artwork will look when exported to image
formats such as TIFF or PNG, since you control those results with your choices in the export
settings.
Live Effects
Live Effects, such as 3D effects, glows, and distortions such as Scribble and Zig Zag, change
the visual appearance of objects, but they do not permanently alter the underlying artwork.
Consequently, Live Effects are continuously editable, provided the file is not saved in a format
that does not allow editability, such as older Illustrator formats. Some of these effects require
special handling to ensure that they print as expected.
3D objects
Illustrator creates the visual effect of three-dimensional depth by applying transformations and
shading to vector objects. The 3D objects created by the 3D Effects feature can be rotated in the
3D function dialog box, and the depth, lighting, and perspective of objects can be repeatedly
edited. To create 3D effects, select an object and choose Effect > 3D and then select one of the
options: Extrude & Bevel, Revolve, or Rotate. To edit existing 3D effects, however, do not choose
the 3D option again from the Effect menu. Instead, double-click the 3D entry in the Appearance
panel (Window > Appearance). The 3D Options dialog box appears.
3D Effects
To edit existing 3D effects, double-
click the 3D entry in the Appearance
panel . To see additional controls
in the 3D Options dialog, click the
More Options button .
If the object is intended to print as four-color process, no additional measures are necessary.
However, if the object uses a spot color, special handling is required to ensure that the spot color
prints as intended. The option to retain spot color is hidden in the initial view of the 3D Options
dialog box. To access the spot-color option, click the More Options button in the 3D dialog box.
Controls for lighting and spot-color preservation are displayed at the bottom of the dialog box.
Adobe Creative Suite 4 Printing Guide
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