Places this element in a non-visual box (logical grouping) which is used to group components of an equation or other instance of mathematical text. A boxed object can (for example) serve As an operator emulator with or without an alignment point, serve As a line break point, or be grouped such As not to allow line breaks within....Places this element in a non-visual box (logical grouping) which is used to group components of an equation or other instance of mathematical text. A boxed object can (for example) serve as an operator emulator with or without an alignment point, serve as a line break point, or be grouped such as not to allow line breaks within.