MessageDialog[expr] puts up a standard message dialog that displays expr together with an OK button.MessageDialog[expr, {lbl_1 :> act_1, lbl_2 :> act_2, ...}] includes ...
NotebookSelection[] represents the current selection in the current evaluation notebook in the front end.NotebookSelection[nb] represents the current selection associated ...
Quit
(Built-in Mathematica Symbol) Quit[] terminates a Mathematica kernel session.
SelectedNotebook[] gives the currently selected notebook in the front end.
StyleDefinitions is an option for notebooks that gives definitions for the styles that can be used in a notebook.
CreateDocument[] creates an empty document notebook and opens it in the front end.CreateDocument[expr] creates and opens a document notebook containing the expression ...
LibraryUnload[lib] unloads all functions that have been loaded from a Wolfram Library, then it unloads the library.
Mathematica options starts the full Mathematica system including notebook interface on Windows and Mac.
Bookmarks is an option for Manipulate and related functions that gives a list of bookmark settings.