Using the Type tool , place
the insertion point in or select the cell or cells you want to affect.
Choose Table > Cell Options >
Text, or display the Table panel.
Under Cell Insets, specify values for Top, Bottom, Left,
and Right, and then click OK.
In many cases, increasing the cell inset spacing will
increase the row height. If the row height is set at a fixed value,
make sure that you leave enough room for the inset values, to avoid
causing overset text.