DocumentationMathematicaBuilt-in FunctionsInput and OutputBox Options
ButtonExpandable is an option for ButtonBox which specifies whether the button should expand to fill any GridBox position in which it appears.
The default setting is ButtonExpandable->True.
This setting is usually used for all buttons that appear in palettes.
With ButtonExpandable->False the size of a button is determined purely by its contents, independent of its environment.
With ButtonExpandable->False, gutters will often be left between buttons in a GridBox.
See Section 2.9.11.
See also: ButtonMargins, ButtonMinHeight, TextJustification.
New in Version 3.