The user manual introduces you to the main elements of the Marble Desktop application (KDE and Qt version). You can open it from within Marble using the F1
shortcut (and from the Help
menu). You can also access it online at docs.kde.org.
Does the user manual not answer your question? The following resources may be helpful as well.
You can also get in touch with other users and Marble developers.
Learn how to make full use of Marble's offline routing and turn-by-turn navigation capabilities on your smartphone with the tutorials from the UserBase Wiki.
We have a support thread for both the Maemo (N900) as well as the MeeGo (N9/N950) version at maemo.org Talk. Both threads provide additional information about the mobile versions.