Split expense line: natural account expected to be defaulted based on expense type

Summary:

When click the Split action in expense, the first line appear default account,

Oracle will use default account from employee's assignment as default value of the first split line in split allocation dialog.

So could you please tell me how to change the default value in split line, we need to change it to the account in expense type.

Content (required):

When click the Split action in expense, the first line appear default account,

Oracle will use default account from employee's assignment as default value of the first split line in split allocation dialog.

So could you please tell me how to change the default value in split line, we need to change it to the account in expense type.