Use the vertical and horizontal scale options to increase or decrease the size of text. LiveCycle Designer ES calculates font scaling in percentage units. The default value for the vertical and horizontal scale is either 100% or no scaling. The minimum value you can enter is 1%. The maximum value you can enter is 1000%. Negative values are not applicable. You can enter values that have up to two decimal places (for example, 50.75%).
Note:
The Vertical Scale and Horizontal Scale boxes display Mixed when you apply different vertical or horizontal scale values within one or more selected objects.
See also 

To change the vertical or horizontal scale of text