When using keyboard shortcuts for menu commands, certain alternates have been established based on U.S. keyboards. For instance, 6 is an alternative for ^ since both characters are located on the same key on U.S. keyboards.
In the case of international keyboards, some keyboard shortcuts may not work, such as shortcuts involving characters created using the German +GR key. For most shortcuts, there are alternatives that should always work.
6
is an alternative for 
+GR key. For most shortcuts, there are alternatives that should always work.