<\body> In , arbitrary blocks of cells in the table may be formatted in particular ways. For instance, you may give individual cells a background color, but you may also decide an entire column to be horizontally centered. By default, formatting commands operate on individual cells, but this may be changed via . The following operation modes are available: <\description> >Operate on individual cells. >Operate on rows. >Operate on columns. >Operate on the entire table. It is also possible to select a block of cells using the mouse and perform a single operation on that rectangle. <\initial> <\collection>