Change the cell margins in a table

You can add cell "padding" (spacing between the boundary of the cell and the text inside the cell) by changing the cell margin.

Show Change the margins of all cells

Click the table.
On the Table menu, click Table Properties, and then click the Table tab.
Click Options.
Under Default cell margins, enter the new values you want.

Show Change the margins of a single cell

Click the cell.
On the Table menu, click Table Properties, and then click the Cell tab.
Click Options.
Clear the Same as the whole table check box, and then enter the new margin values.