Menubars and toolbars are one of the most important parts of an application to provide methods to work with a document structure. As a general rule, you should make all functions available by the menubar. Those methods that should not be available at a current stage of the application process should be disabled.

Further, an application can only contain one menubar, but several toolbars. Toolbars on the other hand should contain only the most frequently used commands by pixmap icons or provide quick access methods like combos to select values.