You can have access to all KDE and other system wide documentation resources through the KDE help center. You can open it going to -> in the main menu.
KDE Help Center is the integrated help system. It can display HTML help pages, UNIX Man pages, Info pages and Scrollkeeper catalogs[2]. It is organized like a two-frames web page, the left frame containing the category menus organized as a tree, while the right frame displays the contents of the category currently selected.
Navigation buttons are like Konqueror's browser ones:
Home. Returns to the page which opens when the
Help Center is launched, that is the “index”
page. Keyboard shortcut:
Ctrl-Home.
Back. Goes “back” to the
previously visited help topic. Keyboard shortcut: Alt-Left_arrow.
Forward. Goes “forward” in
KDE's Help Center's site and topic history. Keyboard
shortcut: Alt-Right_arrow.
Print. Prints the currently
displayed help topic. Keyboard shortcut:
Ctrl-P
You should also consult the KDE Web site where you will find many documents to help you discover and master the K Desktop Environment.