Use Capitalize on the Extras menu to capitalize selected text.
The first item on the Capitalize submenu, abcd->ABCD, capitalizes every letter of the selected text.
The second item on the Capitalize submenu, ABCD->abcd, turns all the letters of the selected text into lower case.
The last item of the Capitalize submenu, abcd->Abcd, capitalizes the first letter of every selected word. Uppercase letters within a word are not changed.