You can change the vertical alignment of paragraphs in a table cell, text box, or shape so that text is aligned to the top or bottom border or centered between top and bottom.
Select the text box, table cell, or shape whose alignment you want to change.
Click Inspector in the toolbar, click the Text button, and then click Text.
Click one of the three vertical alignment buttons to align text to the top, middle, or bottom of the table cell, text box, or shape.
The vertical alignment buttons are also available on the format bar when you’re working with a table cell.