9. When you’re finished setting up a header/footer, click the Preview
button to preview your header/footer and then click OK to return to
the Add Headers & Footers dialog box.
10. Click OK to insert your new header or footer.
Headers and footers can be edited in a number of ways by selecting their
Date, Page Number, or Custom Text elements in the alignment boxes in which
they appear and then using the Remove and Insert buttons. For example, to
change the position of a header/footer element, select the Date, Page Number,
or Custom text element in the alignment box that it appears in, and then click
the appropriate Align button to change its position. To delete a selected ele-
ment, click the Remove button. After deleting an unwanted header/footer
element, you can then create new ones by specifying Date, Page Number, or
Custom Text parameters and using the Insert and Align buttons to position
them in the header/footer.
You can Undo and Redo headers and footers created in a single session,
meaning any you’ve created before clicking OK to close the Add Headers &
Footers dialog box, by choosing Edit➪Undo Headers/Footers or Edit➪Redo
Headers/Footers. If you created headers or footers at different times, you can
repeat these commands to Undo or Redo headers/footers from previous Task
Adding Watermarks and Backgrounds
to PDF Documents
Acrobat 6 now supports document layers created in AutoCAD or Microsoft
Visio (see the “Editing Document Layers in a PDF File” section, later in this
chapter). One of the benefits of this new functionality is the ability to add
watermarks and background images to a PDF document. Just remember that
you can’t edit watermarks and background layers in Acrobat 6 as you can
with AutoCAD or Visio layers.
A watermark in the non-digital world is a faint image impressed on paper
during manufacture that appears when the paper is held up to the light, such
as the company logo you see on fine manuscript paper. They are also used as a
security measure, such as the word “Sample” across a photo that makes it diffi-
cult to reproduce, or the authenticating images you find on traveler’s checks
and the like. In Acrobat 6, watermarks are placed in a layer on top of the dis-
played page. Background images are the color, texture, or pattern placed in a
layer behind the displayed page. Note that an image must be converted to PDF
in order for it to be used as a watermark or background in Acrobat 6. For more
on creating PDF files from graphic formats, see Chapter 4.
Chapter 10: Editing PDF Files