XHTML Table Layout
When you insert a table in an XHTML document, an HTML type of table is added. The
            layout of
            an XHTML table includes a colspecs section that allows you
            to easily configure some properties. For example, you can change the value of column
            widths
            (width attribute) or the text alignment (align attribute).
            Although they appear as part of the Author mode, the colspecs link and its
            controls will not appear in your output. They are just there to make it easier to
            adjust how
            the columns of your table are formatted.
         
Table Layout in XHTML Documents

