Specifies whether block staple may be displayed at the left side of the text range.
property DrawStaple: Boolean;
Block staple is a visible element that links together lines of the text range. Staple is displayed at the left side of text range's lines. They help to represent hierarchical structure of the text.
Block staple does not refer to the text range. Block staples are created at the finish of analysis and they are not deleted with text ranges when text is changed. This allows to remove flicker effects.