The preferred place to ellipsize the string, if the label does not have enough room to display the entire string.
Note that setting this property to a value other than pango_ellipsize_none has the side-effect that the label requests only enough space to display the ellipsis "...". In particular, this means that ellipsizing labels do not work well in notebook tabs, unless the [[email protected]:tab-expand] child property is set to true. Other ways to set a label's width are [[email protected]_size_request] and [[email protected]_width_chars].