Rounding by Document Setting

Dear Experts,

When rouding by currency, i have the option to round to the nearest 5ct or nearest 10ct. However when i put the setting to rounding by document, it always rounds to the nearest whole amount. Even if i try to manually change is to another it changes back.

In this situation i would rather have it rounded to SRD 6741.70

Is there a location where for the settings for rounding by Document?