If you want borders around each individual box or cell, select All Borders from the drop-down menu instead. If you want more formatting options for your border, such as line thickness or color, select those options near the end of the drop-down menu. You can also click More Borders at the end of the drop-down menu then select the Border tab to edit the border settings further. If you want to remove a border just highlight it again and select No Border from the Border button drop-down menu.