Default Values in Refund Attributes of CUstomer Refund Screen

Hi,
Can anyone  clarify on the below

1)What is the source of 'Payment Method' from which it is defaulted iin Refund attributes form

2)And also no values is seen defaulted in rest of the fields in Refund attributes,is this intended functinality or is there any we can default these values.


Any help on this is highly appreciated.

THanks