You can set the following options in the General section of the Adobe PDF Options 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. If you edit the description of a preset, the word “(Modified)” is added at the end of the preset name.

Preserve Photoshop Editing Capabilities

Preserves Photoshop data in the PDF, such as layers, alpha channels, and spot colors. Photoshop PDF documents with this option can be opened only in Photoshop CS2 and later.

Embed Page Thumbnails

Creates a thumbnail image of artwork.

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.