Hyperlinks add interactivity to an eBook by providing a means of navigating to
desired information quickly and easily. Using links, an eBook reader can jump
to a different place in the current page, call up other pages in the eBook, and
even retrieve other documents on a network or download pages from the
World Wide Web. When you create a link in Acrobat 6, you define an area in
the document for the link, choose whether it appears visible or invisible to the
user, and specify what occurs when the user clicks the link. Acrobat 6 lets you
create internal links that navigate to destinations in the current document —
atable of contents link, for example — as well as external links that retrieve
other documents on a network or Web pages from the Internet.
One of the main goals in using an eBook authoring program that can export
its documents to PDF is that the majority of links you might need in your
eBook can be set up in the authoring program and automatically converted
to PDF during the export process. There are times, however, when you’ll want
to edit those export-generated links or add new links to your eBook. The fol-
lowing sections take you through the process.
Adding an internal link
You create all links with the Link tool, which is found on the Advanced
Editing toolbar. To select the tool, click its button on the toolbar or press L.
To add an internal link to your eBook, follow these steps:
1. Open the eBook file and navigate to the page in which you want to
add a link.
2. Select the Link tool and use its cross-hair pointer to draw a rectangle
in the area of the page you want users to click to activate the link, and
then release the mouse button.
The Create Link dialog box opens, as shown in Figure 15-11.
When you select the Link tool, any links currently in the document tem-
porarily appear even if they are hidden. The Link Properties toolbar also
opens, as shown in Figure 15-11. See the next section for details on the
options provided in this toolbar.
3. In the Link Actions area of the Create Link dialog box, select the Open
a Page in This Document radio button, enter the page number for
your link’s destination page in the Page text box, and select a Zoom
setting from the Zoom drop-down list.
The zoom settings determine how the destination page is displayed in
the PDF reader after clicking a link and are the same as those provided
in Acrobat 6 — Fit Page, Actual Size, Fit Width, Fit Visible, and Inherit
Part IV: PDFs as Electronic Documents