Specify how to handle an element that has too much text to fit inside its boundaries.
Use one of these keywords:
|visible||The text simply overflows the boundaries and overruns whatever else is there.|
|hidden||The text is clipped at the right and bottom boundaries and is not visible.|
|scroll||Vertical and horizontal scrollbars are always visible, but are only enabled if the text is too wide or too high to fit.|
|auto||If the text fits, no scrollbars are shown. If the text is too wide or too high to fit, scrollbars are shown and enabled.|