An indicator box is displayed to the left of the label in a checkbutton entry. Radiobutton entries are organized in groups of which only one entry may be selected at a time. This action causes any previously-selected entry in the same group to deselect itself. Once an entry has become selected, any change to the entry's associated variable will cause the entry to deselect itself. An indicator diamond is displayed to the left of the label in each radiobutton entry.
Cascade entries allow the construction of cascading menus.