Activating Currency Precision
Currency precision is a PeopleTools option; selecting this option activates all of its features. With the option turned off, the system displays amount fields as defined in PeopleSoft Application Designer and rounds them to the number of decimals defined there.
Activate the PeopleTools multicurrency option on the PeopleTools Options page (PSOPTIONS) by selecting the Multi-Currency check box. PeopleTools will then use the precision you specify in the Currency Code page (CURRENCY_CD_TABLE ) for the currencies relating to monetary fields for which you have specified currency control fields. Some PeopleSoft applications are shipped with the Multi-Currency check box selected. You can change that default.
Note:
Once you deselect the Multi-Currency check box, selecting it again does not automatically round the existing transaction amounts. If you deselect the Multi-Currency check box, PeopleSoft supports only the default amount field size of 13.2. It does not support the larger amount field size of 15.3.