File format options

You can export PDFs to XPDF format, or resave them as optimized PDFs, using settings in the PDF Optimizer dialog box. The PDF Optimizer lets you change the compatibility version of your PDFs so they can be viewed using older versions of Acrobat or Adobe Reader. When you change the compatibility setting, newer features may be unavailable in the PDF. For an explanation of each compatibility setting, see PDF compatibility levels.

You can export a PDF to PostScript for use in printing and prepress applications. The PostScript file includes full DSC (Document Structuring Conventions) comments and other advanced information preserved by Distiller. You can also create an EPS file from any PDF for placement or opening in other applications. The options available depend on whether you are converting a document to PostScript or EPS. (For a complete description of PostScript options, see PostScript options.)

Printer Description File

The PostScript Printer Description (PPD) provides the necessary information to format a PostScript file correctly for a particular output device. Device Independent creates only composite (not color-separated) PostScript or EPS files. Acrobat Default provides a starting point and reference for creating all types of PostScript and restores all default settings for the conversion. Adobe PDF 7.0 is compatible with most devices.This option is available only for PostScript (PS) format.

ASCII or Binary

Specifies the output format of image data. Binary output yields smaller files, but not all workflows can accommodate binary output.

PostScript

Specifies the level of PostScript compatibility. Use Language Level 3 only if the target output device supports it. Language Level 2 is suitable for EPS files that will be placed in another document and color-separated as part of that document. Use Language Level 2 for EPS files that you import into Microsoft applications.

Page Range

Specifies the pages you want to export. When you export files to EPS output, each page in the range is saved as a separate EPS file.

When you export a PDF file to HTML or XML format, any images in PDF are converted to JPEG format.

Encoding

Refers to the binary values, based on international standards, used to represent the text characters. UTF-8 is a Unicode representation of characters using one or more 8-bit bytes per character; UTF-16 represents characters using 16-bit bytes. ISO-Latin-1 is an 8-bit representation of characters that is a superset of ASCII. UCS-4 is a Universal Character Set coded in 4 octets. HTML/ASCII is a 7-bit representation of characters developed by ANSI.

Use Mapping Table Default uses the default character encoding defined in mapping tables, which appear in the Plug-ins/SaveAsXML/MappingTables folder. These mapping tables specify many characteristics of how the data is output, including the following default character encodings: UTF-8 (Save as XML or HTML 4.0.1) and HTML/ASCII (Save as HTML 3.2).

Generate Bookmarks

Generates bookmark links to content for HTML or XML documents. Links are placed at the beginning of the resulting HTML or XML document.

Generate Tags For Untagged Files

Generates tags for files that are not already tagged, such as PDFs created using Acrobat 4.0 or earlier. If this option is not selected, untagged files are not converted.

Note: Tags are applied only as part of the conversion process and are discarded after the conversion. This is not a method for creating tagged PDFs from legacy files.

Generate Images

Controls how images are converted. Converted image files are referenced from within XML and HTML documents.

Use Sub-Folder

Specifies the folder in which to store generated images. The default is Images.

Use Prefix

Specifies the prefix added to the image file names if you have several versions of the same image file. File names assigned to images have the format filename_img_#.

Output Format

Specifies the final format. The default is JPG.

Downsample To

Downsamples image files to the specified resolution. If you do not select this option, image files have the same resolution as in the source file. Image files are never upsampled.

If your PDF contains a collection of images, you can export them individually as JPEG, PNG, or TIFF files by choosing Advanced > Document Processing > Export All Images.

Note that the options available depend on whether you are exporting a document to JPEG or JPEG2000.

Grayscale/Color

Specify a compression setting that balances file size with image quality. The smaller the file, the lesser the image quality.

Tile Size

Divides the image being compressed into tiles of the given size. (If the image height or width is not an even multiple of the tile size, partial tiles are used on the edges.) Image data for each tile is individually compressed and can be individually decompressed. The default value of 256 is recommended. This option is available only for JPEG2000 format.

Format

Determines how the file is displayed. Available only for JPEG format.

Baseline (Standard)

Displays the image when it has fully downloaded. This JPEG format is recognizable to most web browsers.

Baseline (Optimized)

Optimizes color quality of the image and produces smaller file sizes but is not supported by all web browsers.

Progressive (3 scans-5 scans)

Downloads the image first as a low-resolution image, with incremental quality improvements as downloading continues.

RGB/CMYK/Grayscale

Specifies the type of color management to be applied to the output file and whether to embed an ICC profile.

Note: If you use the Save As or Export All Images command on a PDF that contains JPEG and JPEG2000 images, and export the content to JPEG or JPEG2000 format, the resulting image may look different when opened in Acrobat. This can happen if the images have a color profile included at the page level but not inside the image data. In this case, Acrobat cannot bring the page-level color profile into the resulting saved image.

Colorspace/Resolution

Specifies a color space and resolution for the output file. You can let Acrobat determine these settings automatically. To convert color images in the file to shades of gray, choose Grayscale.

Note: Higher resolutions, such as 2400 pixels per inch (ppi), are suitable only for small page sizes (up to 6.826 inches or 173.380 millimeters).

PNG format is useful for images that will be used on the web.

Interlace

Specifies if the image is interlaced. None creates an image that displays in a web browser only after downloading is complete. Adam7 creates an image that displays low-resolution versions in a browser while the full image file is downloading. Adam7 can make downloading time seem shorter and assures viewers that downloading is in progress; however, it increases file size.

Filter

Lets you select a filtering algorithm.

None

Compresses the image without a filter. Recommended for indexed-color and bitmap-mode images.

Sub

Optimizes the compression of images with even horizontal patterns or blends.

Up

Optimizes the compression of images with even vertical patterns.

Average

Optimizes the compression of low-level noise by averaging the color values of adjacent pixels.

Paeth

Optimizes the compression of low-level noise by reassigning adjacent color values.

Adaptive

Applies the filtering algorithm—Sub, Up, Average, or Paeth—best suited for the image. Select Adaptive if you are unsure of which filter to use.

RGB/CMYK/Grayscale

Specifies the type of color management for the output file and whether to embed an ICC profile.

Colorspace/Resolution

Specifies a color space and resolution for the output file. You can let Acrobat determine these settings automatically. To convert color images in the file to shades of gray, choose Grayscale.

Note: Higher resolutions, such as 2400 ppi, are suitable only for small page sizes (up to 6.826 inches or 173.380 millimeters).

TIFF is a flexible bitmap image format supported by virtually all paint, image-editing, and page-layout applications. Resolution is determined automatically.

Monochrome

Specifies a compression format. CCITTG4 is the default and generally produces the smallest file size. ZIP compression also produces a small file.

Note: Some applications cannot open TIFF files that are saved with JPEG or ZIP compression. In these cases, LZW compression is recommended.

RGB/CMYK/Grayscale/Other

Specifies the type of color management for the output file.

Colorspace/Resolution

Specifies a color space and resolution for the output file. You can let Acrobat determine these settings automatically. To convert color images in the file to shades of gray, choose Grayscale.

Note: Higher resolutions, such as 2400 ppi, are suitable only for small page sizes (up to 6.826 inches or 173.380 millimeters).