Adobe Illustrator CS4 - Manual (Page 272)

265 USING ADOBE ILLUSTRATOR CS4
Importing, exporting, and saving
• If you import an EPS color that has the same name as a color in your document but a different definition, Illustrator
displays an alert. Select Use Linked File’s Color to replace the color in your document with the EPS color in the
linked file. All objects using this color in your document will get updated appropriately. Select Use Document’s
Color to leave the swatch as is and resolve all color conflicts using the document’s color. The EPS preview cannot
be changed, so the preview may be incorrect, but it will print to the correct plates. Selecting Apply to All will resolve
all color conflicts, using the definition either of the document or the linked file, depending on which option you
choose.
• Occasionally you may encounter a warning when opening an Illustrator document containing embedded EPS
images. If the application cannot find the original EPS image, you will be prompted to extract the EPS image. Select
the Extract option in the dialog box; the image will be extracted into the same directory as the current document.
Although the embedded file does not preview in the document, the file will now print correctly.
• By default, linked EPS files are displayed as a high resolution preview. If a linked EPS file isn’t visible in the
document window, it may be because the file’s preview is missing. (Previews are sometimes lost when transferring
EPS files saved with PICT previews from Mac
OS to Windows.) To restore the preview, resave the EPS file with a
TIFF preview. If performance is negatively affected when you place the EPS, reduce the preview resolution: choose
Edit > Preferences
> File Handling & Clipboard (Windows) or Illustrator > Preferences > File Handling &
Clipboard (Mac OS), and select Use Low Resolution Proxy For Linked EPS.
See also
“ About linked and embedded artwork ” on page 257
“ Save in EPS format ” on page 269
Importing DCS files
Desktop Color Separation (DCS) is a version of the standard EPS format. The DCS 1.0 format supports only CMYK
images while the DCS 2.0 format supports multichannel CMYK files as well as multiple spot inks. (These spot inks
appear as spot colors in Illustrator’s Swatches panel.) Illustrator recognizes clipping paths in Photoshop-created DCS
1.0 and DCS 2.0 files. You can link DCS files in Illustrator, but you can’t embed or open them.
To see DCS transparency interactions in the Links panel, choose Panel Options from the Links panel menu and select
Show DCS Transparency Interactions.
Importing AutoCAD files
AutoCAD files include both DXF and DWG formats. You can import AutoCAD files from version 2.5 through version
2006. During import, you can specify scale, unit mapping (custom unit for interpreting all the length data in the
AutoCAD file), whether to scale lineweights, which layout to import, and whether to center the artwork.
Illustrator supports most AutoCAD data, including 3D objects, shapes and paths, external references, region objects,
spline objects (mapped to Bezier objects that retain the original shape), raster objects, and text objects. When
importing an AutoCAD file that contains external references, Illustrator reads the contents of the reference and places
it at the appropriate locations in the Illustrator file. If an external reference is not found, the Missing Link dialog box
opens so you can search for and retrieve the file.