DocumentationMathematicaBuilt-in FunctionsNew in Version 3.xNotebooks
ButtonSource is an option for ButtonBox which specifies the first argument to give to the ButtonFunction for the button when the button is active and is clicked on.
The default is ButtonSource->Automatic.
Possible settings are:
See Section 2.11.6.
See also: ButtonFunction, ButtonData, ButtonStyle, NotebookRead.
New in Version 3.