

KHelpCenter can be called in several ways:
The most common will probably be from within an application. Choose -> to open that application's help file, at the contents page.
Choose the big K in your panel, and select to open KHelpCenter, starting at the default welcome page.
By default, the Kicker panel contains an icon to call KHelpCenter. Again, the default welcome page is displayed.
KHelpCenter may be started using a URL to display a file. URLs have been added for info and man pages also. You can use them as follows:
khelpcenter
help:/
kedit
Opens the KEdit help file, at the contents page.
khelpcenter
file:/
usr/local/src/qt/html/index.html
khelpcenter
man:/
strcpy
khelpcenter
info:/
gcc
Invoking khelpcenter with no parameters opens the default welcome page.