Payments Form APXPAWKB - Manual Checks for foreign currency -> Rate Type

We are on 12.2.5. When a manual check is entered for a foreign currency and I enter the date, the rate for that day is automatically entered. For one responsibility, it defaults in the period average rate. For another responsibility, it defaults in the daily rate.

Where is this setup? What drives the rate that is populated in this window when the date is entered?

Thank you,

Nancy