Field help (ACCMONT) 

This screen makes it possible to force the line amounts in company currency
and/or reporting currency in the case where the conversion carried out by X3
is not appropriate. If the amount in document currency is not nil, these
amounts will automatically be in the same sense (debit or credit) as
those in the document currency. In the case where the amount in document currency
is nil the sense will be determined by the sign of the amounts with
the following convention: + = debit, - = credit.