Click on the table tab. The padding is the amount of space between what is in a cell and the cell wall. To change the padding enter a value between zero and 100 in the box marked padding. Spacing is the thickness of the lines between cells. To change the spacing enter a value between zero and 100 in the box marked spacing.
Border is the thickness of the border around the table.
To change the border enter a value between zero and 100 in the box marked border. If you give a table of value of zero the table will become invisible. In edit mode you will still see a border. To see what your table looks like without a border go to the preview mode. Click on the table tab.