There is a lot to be done in the KPresenter manual. The below list is not necessarily complete, and does not follow any particular order.
Flesh out the introduction by describing presentations software and the features of KPresenter in particular.
Add a "What should I read?" section to the introduction.
Expand the tutorial. Introduce more features to the new user.
Write the "KPresenter Screen" chapter.
Create an outline for the "Detailed Guides" chapter(s).
Come up with a set of questions for the "Q and A" chapter.
Write the "KPresenter Options" chapter.
Write the tool bars/menu items chapter.