The Decimal Points field controls the number of decimal points to display.
Any # - Sets the number of decimal points to print. Identifies the field as a number (rather than text) when exporting. If the field contains 0, it will be replaced with the contents of the Field Text field (if any).
Negative # - Sets the maximum number of decimals, without trailing zeroes.
-99 - Uses the same number of decimals as the Price fields.
-98 - Uses the same number of decimals as the Cost fields.
-97 - Uses the same number of decimals as the Money fields.
See:
Report/Label Editor Contents