Select that particular table that you want to modify. Two new tabs called Design and Layout will now appear in the Ribbon. These tabs offer various new groups of commands to format your tables.
When you click on the Design tab it displays to you four new groups of commands; Table Style Options, Table Styles, Word Art Styles and the Draw Borders.
See the Image:
When you click on the Layout tab it will display six groups of commands; Table, Rows & Columns, Merge, Cell Size and Alignment.
See the Image:
