Text and Cell Alignments
Text control allows you to control the way Excel XP presents information in a cell. There are three types of text control: wrapped text, shrink to fit, and merge cells.
The wrapped text feature wraps the contents of a cell across several lines if it's too large than the column width. It also increases the height of the cell.
The shrink-to-fit feature shrinks the text so it fits into the cell; the more text in the cell, the smaller it will appear in the cell.
The merge cells feature can also be applied by using the Merge and Center button on the Standard toolbar.