Transaction: OY04
IMG Path: SAP NetWeaver -> General Settings -> Currencies -> Set Decimal Places for Currencies
Table: TCURX

After opening the transaction, you will get a a consequence warning message.
First screen warning message.

Second warning message.

Third warning message that you should read carefully before proceeding.

Currencies with other than 2 decimal places.

Here is the screen for New Entries maintaining Decimal Places for currencies with other than two decimal places.

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