Adobe Illustrator CS4 - Manual (Page 282)

275 USING ADOBE ILLUSTRATOR CS4
Importing, exporting, and saving
Photoshop (PSD) The standard Photoshop format. If your artwork contains data that cannot be exported to
Photoshop format, Illustrator preserves the appearance of the artwork by merging the layers in the document or by
rasterizing the artwork. As a result, there may be times when layers, sublayers, compound shapes, and editable text are
not preserved in the Photoshop file, even though you selected the appropriate export option. For more information,
see “
Photoshop export options ” on page 279.
PNG (Portable Network Graphics) Used for lossless compression and for display of images on the web. Unlike GIF,
PNG supports 24-bit images and produces background transparency without jagged edges; however, some web
browsers do not support PNG images. PNG preserves transparency in grayscale and RGB images. For more
information, see “
PNG export options ” on page 279. You can also save an image as a PNG file using the Save For Web
& Devices command.
Targa (TGA) Designed for use on systems that use the Truevision® video board. You can specify a color model,
resolution, and anti-alias setting for rasterizing the artwork, as well as a bit depth to determine the total number of
colors (or shades of gray) that the image can contain.
Text Format (TXT) Used to export text in an illustration to a text file. (See “ Export text to a text file ” on page 334.)
TIFF (Tagged-Image File Format) Used to exchange files between applications and computer platforms. TIFF is a
flexible bitmap image format supported by most paint, image-editing, and page-layout applications. Most desktop
scanners can produce TIFF files. For more information, see “
TIFF export options ” on page 280.
Windows Metafile (WMF) An intermediate exchange format for 16-bit Windows applications. WMF format is
supported by almost all Windows drawing and layout programs. However, it has limited vector graphics support, and
wherever possible, EMF format should be used in place of WMF format.
See also
“ About saving artwork ” on page 267
“ Export artwork ” on page 273
AutoCAD export options
When you export artwork to either DXF or DWG format, you can set the following options:
AutoCAD Version Specifies the earliest version of AutoCAD that supports the exported file.
Scale Enter values for Scale Units to specify how Illustrator interprets length data when writing the AutoCAD file.
Scale Lineweights Scales the lineweights, along with the rest of the drawing, in the exported file.
Number of Colors Determines the color depth of the exported file.
Raster File Format Specifies whether images and objects that are rasterized during export are saved in PNG or JPEG format.
Only PNG supports transparency; if you need to preserve appearance to the maximum extent possible, choose PNG.
Preserve Appearance Select if you need the appearance to be maintained and don’t need to make edits to the exported
file. Selecting this option may lead to a significant loss of editability. For example, text may be outlined and effects will
be rasterized. You can select this option or Maximum Editability, but not both.
Maximum Editability Select if the need to edit the file in AutoCAD outweighs the need for maintaining appearance.
This option may lead to significant loss of appearance, especially if you’ve applied style effects. You can select this
option or Preserve Appearance, but not both.
Export Selected Art Only Exports only the artwork in the file that is selected at the time of export. If no artwork is
selected, a blank file is exported.