I remember the first version of Keynote had a nice manual -- and the second one, which came as part of iWork 05 also had a substantial paper manual in the box. Then the box became smaller in iWork 06 -- and maybe even smaller in iWork 08, the newest version.
iWork 08 still includes some sort of a manual but it's not an exhaustive documentation for all Keynote options and features. However, if you have your iWork CD/DVD around, you'll find it contains a PDF manual. And the same manual is also available online on Apple's site.
To download a copy of the Keynote manual, go to:
http://www.apple.com/support/keynote/
While you are on that page, you'll find a prominent link to the Keynote user manual, as you can see in Figure 1.

Figure 1: Download the Keynote manual
As you can see in Figure 1, this link provides a download for the manual of the latest version of Keynote. So what if you have an older version of Keynote and want a manual for that version? No worries - use this link:
http://support.apple.com/manuals/#keynote
As you can see in Figure 2, this page provides manuals for all Keynote versions except Keynote 1.

Figure 2: Manuals of previous Keynote versions
Labels: apple, basics, geetesh bajaj, iwork, keynote, manual