You can set the following options in the General section of the Save Adobe PDF dialog box:

Description

Displays the description from the selected preset, and provides a place for you to edit the description. You can paste a description from the clipboard. Editing the description of a preset appends the word “(modified)” to the preset name. Conversely, changing the settings in a preset prepends the description with “[Based on <Current Preset Name>].”

Preserve Illustrator Editing Capabilities

Saves all Illustrator data in the PDF file. Select this option if you want to be able to reopen and edit the PDF file in Adobe Illustrator.

Important: The Preserve Illustrator Editing Capabilities option counteracts aggressive compression and downsampling. If file size is a concern, deselect this option.

Embed Page Thumbnails

Creates a thumbnail image of artwork. The thumbnail is displayed in the Illustrator Open or Place dialog boxes.

Optimize For Fast Web View

Optimizes the PDF file for faster viewing in a web browser.

View PDF After Saving

Opens the newly-created PDF file in the default PDF viewing application.

Create Acrobat Layers From Top-level Layers

Saves Illustrator’s top-level layers as Acrobat layers within the PDF file. This allows Adobe Acrobat 6, 7, and 8 users to generate multiple versions of the document from a single file.

Note: This option is only available when Compatibility is set to Acrobat 6 (1.5), Acrobat 7 (1.6), and Acrobat 8 (1.7).

Save Tiled Artboard To Multiple Page PDF Document

Saves each tile in the Illustrator document as a separate page in the PDF file.