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User Guide

In the Images panel, you can select the following options:

Downsample

Reduces file size by lowering the resolution of images, which involves merging the colors of original

pixels into larger pixels.

Note:

Masked images and images with a size less than 16-by-16 pixels are not downsampled.

Compression

Reduces file size by eliminating unnecessary pixel data. In general, JPEG and JPEG2000 compression

give better results on images like photographs with gradual transitions from color to color. ZIP is the better choice

for illustrations with large areas of solid, flat color or patterns made up of flat colors. For monochrome images, JBIG2

compression, which is available in PDF Optimizer but not in Distiller, is superior to CCITT.

Quality

Can be set only for JPEG and JPEG2000 compression. JPEG and JPEG2000 compression methods are

typically lossy, a process that permanently removes some pixel data. You can apply lossy JPEG or JPEG2000

compression to color images at various levels (minimum, low, medium, high, maximum). For JPEG2000

compression, you can also specify lossless so that no pixel data is removed. Compression for monochrome images is

lossless, except for JBIG2 compression, which provides both lossy and lossless modes of compression.

See also

“Transparency flattening” on page 465

“Edit a flattener preset in the PDF Optimizer” on page 471

“Examine a PDF for hidden content” on page 248

Fonts panel

To ensure an exact match to the source document, you should embed all fonts used in the document. If an exact

match is not needed and you prefer a smaller file, you can choose not to embed fonts for roman text and East Asian

text (Traditional Chinese, Simplified Chinese, Korean, and Japanese). Text in these languages is replaced with a

substitution font when viewed on a system that does not have the original fonts. The Fonts panel of the PDF

Optimizer contains two lists for fonts, fonts that are available for unembedding, and fonts to be unembedded.

Certain fonts aren’t available for unembedding and don’t appear in the Fonts panel. To unembed fonts in a document,

select one or more fonts in the Embedded Fonts list, and click the Unembed button. If you change your mind about

unembedding a font, select it in the list on the right and click the Retain button.

Transparency panel

If your PDF includes artwork that contains transparency, you can use presets in the Transparency panel of PDF

Optimizer to flatten transparency and reduce file size. (Flattening incorporates transparency into corresponding

artwork by sectioning it into vector-based areas and rasterized areas.) PDF Optimizer applies transparency options

to all pages in the document before applying other optimization options.

If you select the Acrobat 4.0 And Later compatibility setting, the Transparency panel is enabled and all transparency

in the file is flattened during optimization. This ensures compatibility with Acrobat 5.0 and earlier, which doesn’t

support transparency.

When you create flattening presets, they appear with the default presets in the Transparency panel.

Note:

Transparency flattening cannot be undone after the file is saved.

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User Guide

Discard Objects panel

The Discard Objects panel lets you specify objects to remove from the PDF and lets you optimize curved lines in

CAD drawings. You can discard objects created in Acrobat and in other applications. Selecting an object removes all

occurrences of that object within the PDF.

In the Discard Objects area, you can select from these and other options:

Discard All Form Submission, Import And Reset Actions

Disables all actions related to submitting or importing form

data, and resets form fields. This option retains form objects to which actions are linked.

Flatten Form Fields

Makes form fields unusable with no change to their appearance. Form data is merged with the

page to become page content.

Discard All JavaScript Actions

Removes any actions in the PDF that use JavaScript.

Discard All Alternate Images

Removes all versions of an image except the one destined for on-screen viewing. Some

PDFs include multiple versions of the same image for different purposes, such as low-resolution on-screen viewing

and high-resolution printing.

Discard Embedded Page Thumbnails

Removes embedded page thumbnails. This is useful for large documents,

which can take a long time to draw page thumbnails after you click the Pages button.

Discard Document Tags

Removes tags from the document, which also removes the accessibility and reflow capabil

ities for the text.

Convert Smooth Lines To Curves

Reduces the number of control points used to build curves in CAD drawings,

which results in smaller PDF files and faster on-screen rendering.

Detect And Merge Image Fragments

Looks for images or masks that are fragmented into thin slices and tries to

merge the slices into a single image or mask.

Discard Embedded Print Settings

Removes embedded print settings, such as page scaling and duplex mode, from

the document.

Discard Embedded Search Index

Removes embedded search indexes, which reduces file size.

Discard Bookmarks

Removes all bookmarks from the document.

Discard User Data panel

Use the Discard User Data panel to remove any personal information that you don’t want to distribute or share with

others. If you’re unable to find personal information, it may be hidden. You can locate hidden text and user-related

information by using the Examine Document command from the Document menu.

Discard All Comments, Forms, And Multimedia

Removes all comments, forms, and multimedia from the PDF.

Discard Document Information And Metadata

Removes information in the document information dictionary and

all metadata streams. (Use the Save As command to restore metadata streams to a copy of the PDF.)

Discard All Object Data

Removes all objects from the PDF.

Discard File Attachments

Removes all file attachments, including attachments added to the PDF as comments. (PDF

Optimizer doesn’t optimize attached files.)

Discard External Cross References

Removes links to other documents. Links that jump to other locations within the

PDF are not removed.

Discard Private Data Of Other Applications

Strips information from a PDF document that is useful only to the appli

cation that created the document. This does not affect the functionality of the PDF, but it does decrease the file size.

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Discard Hidden Layer Content And Flatten Visible Layers

Decreases file size. The optimized document looks like the

original PDF but doesn’t contain layer information.

Clean Up panel

The options in the Clean Up panel of the PDF Optimizer remove useless items from the document. These items

include elements that are obsolete or unnecessary to your intended use of the document. Be aware that removing

certain elements may seriously affect the functionality of the PDF. By default, only elements that do not affect

functionality are selected. If you are unsure of the implications of removing other options, you should use the default

selections.

In the Clean Up area, you can select these options:

Use Flate To Encode Streams That Are Not Encoded

Applies Flate compression to all streams that aren’t encoded.

In Streams That Use LZW Encoding, Use Flate Instead

Applies Flate compression to all content streams and images

that use LZW encoding.

Remove Invalid Bookmarks

Removes bookmarks that point to pages in the document that have been deleted.

Remove Invalid Links

Removes links that jump to invalid destinations.

Remove Unreferenced Named Destinations

Removes named destinations that are not being referenced internally

from within the PDF document. Because this option does not check for links from other PDF files or websites, it may

not fit in some workflows.

Optimize The PDF For Fast Web View

Restructures a PDF document for page-at-a-time downloading (byte-serving)

from web servers.

Editing text and objects

Choosing a tool

Acommon misconception about PDF documents is that they should behave like any other document that contains

images and text, letting you freely move or edit items on a page. A PDF is like a snapshot of your original document.

You can perform minor touch-ups, but if your PDF requires substantial revision, it’s easier to make changes to the

source document and regenerate the PDF.

For editing text and objects, choose from the tools in the Advanced Editing toolbar. To insert editing marks in a PDF

to indicate your changes to the original document, see “Mark up text with edits” on page 173.

The TouchUp Text tool lets you add to and replace existing text if the fonts used are available on the system. If the

fonts aren’t available, you can change only the appearance of existing text. However, you can add new blocks of text

using the TouchUp Text tool. The Typewriter tool also lets you create new text, but provides fewer options to modify

new text than the TouchUp Text tool.

Note:

Using the TouchUp Text tool may affect how the document reflows, which can make the document less accessible

to the visually impaired.

The Select Object tool provides basic editing capabilities for most objects. You can modify the size, page location,

and properties of images, links, fields, and multimedia objects. You can make these same changes with the tool used

to create the object.

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To scale, rotate, flip, or clip an image or object (including text blocks), use the TouchUp Object tool. The TouchUp

Object tool can also place images and change an object’s color space (see “Convert colors to a different color space”

on page 459). If you need to edit the source file for an embedded image or object, the TouchUp Object tool can start

an image-editing or object-editing application.

Note:

Comments—even though they have a graphic appearance—are not considered page elements and therefore cannot

be selected or manipulated using the touchup tools.

Editing text with the TouchUp Text tool

Edit text

You can add or replace text only if the font used for that text is installed on your system. If the font isn’t installed on

your system but is embedded or subsetted in the PDF, you can make changes only to color, word spacing, character

spacing, baseline offset, or font size.

You can edit text on rotated lines in the same way as on horizontal lines, and you can edit text using vertical fonts in

the same way as text using horizontal fonts. The baseline offset or shift for vertical fonts is left and right, instead of

up and down for horizontal fonts.

Edit text using the TouchUp Text tool

1 Choose Tools > Advanced Editing > TouchUp Text Tool, or select the TouchUp Text tool

in the Advanced

Editing toolbar.

2 Click in the text you want to edit. A bounding box outlines the selectable text.

3 Select the text you want to edit:

• Choose Edit > Select All to select all the text in the bounding box.

• Drag to select characters, spaces, words, or a line.

4 Edit the text by doing one of the following:

• Type new text to replace the selected text.

• Press Delete, or choose Edit > Delete to remove the text.

• Choose Edit > Copy to copy the selected text.

• Right-click/Control-click the text and choose the appropriate option.

Click outside the selection to deselect it and start over.

Edit text attributes

1 Select the TouchUp Text tool.

2 Click in the text you want to edit.

3 Right-click/Control-click the text, and choose Properties.

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4 In the TouchUp Properties dialog box, click the Text tab. You can change any of the following text attributes:

Font

Changes the font used by the selected text to the font you specify. You can select any font installed on your

system or fully embedded in the PDF document. Document fonts are listed at the top; system fonts are listed below.

Font Size

Changes the font size to the size (in points) that you specify.

Character Spacing

Inserts uniform spacing between two or more characters in selected text.

Word Spacing

Inserts uniform spacing between two or more words in selected text.

Horizontal Scaling

Specifies the proportion between the height and the width of the type.

Baseline Offset

Offsets the text from the baseline. The baseline is the line on which the type rests.

Fill

Specifies the fill color.

Stroke

Specifies the stroke color.

Stroke Width

Specifies the width of the stroke.

Note:

For legal reasons, you must have purchased a font and have it installed on your system to revise text using that font.

Add new text

You can add new text to a PDF using any of the fonts installed on the system.

1 Select the TouchUp Text tool.

2 Ctrl-click/Option-click where you want to add text.

3 In the New Font dialog box, select the font and mode you want, and click OK.

4 Type the new text.

5 Do any of the following:

• To change the font size and other attributes, select the text, right-click/Control-click, and choose Properties.

• To move the text block, use the TouchUp Object tool.

Add text using the Typewriter tool

Use the Typewriter tool to type text anywhere on a PDF page. Organizations sometimes provide PDF versions of

their paper forms without interactive form fields. The Typewriter tool provides a simple solution for filling out such

forms. The Typewriter tool is similar to the Text Box tool, but includes a different set of default properties.

1 Choose Tools > Typewriter > Show Typewriter Toolbar, and then click the Typewriter button.

2 Click where you want to type, and then begin typing. Press Enter to add a second line.

3 To change the text size, select the text, and click the Decrease Text Size button or the Increase Text Size button in

the Typewriter toolbar.

4 To change the line spacing (leading), select the text, and click the Decrease Line Spacing button or the Increase

Line Spacing button.

5 To move or resize Typewriter text block, select the Select tool, click a Typewriter text block, and drag the text block

or one of its corners.

6 To edit the text again, select the Typewriter tool, and then double-click in the Typewriter text.

Note:

To let Reader users type text in a PDF by using the Typewriter tool, open the PDF in Acrobat Professional, choose

Tools > Typewriter > Enable Typewriter Tool In Adobe Reader, and save the PDF.

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User Guide

Insert special characters

You can insert certain special characters (line breaks, soft hyphens, nonbreaking spaces, and em dashes) in a tagged

PDF to improve the way it reflows. You can also insert these special characters in any PDF to improve the way it’s

read by a screen reader or simply to edit it for general readability purposes. You do not need to have the font installed

in order to insert special characters.

1 Select the TouchUp Text Tool.

2 Click where you want to insert the character, or select text to be replaced by the character.

3 Right-click/Control-click the selected text or location, choose Insert and then select an option.

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