documentation

if i right clik on world i get an option to open documentation which normaly should send me to the page that shows me which metods i can use from the world class i think its called api but i get an erro message hope i have explained it better or ill try again :-)

Ok, you mean when you right-click on the World class in the class diagram? What is the error message? (And just for the future: if you're getting an error message when you try and do something, and you need help, please say that you're getting an error message and tell us what the error message says. Really it makes it easier for us to help you).