...

• Accrual: To add specific incomes. You can enter incomes on the Incomes tab or edit the incomes added from a document selected as the basis.
• Reversal: To reverse some Other Incomes document posted earlier and selected as the basis. 

Optionally, in the Basis field, specify a document which can be used as a basis for the current document. Use the Fill by Basis button to populate the current document with the data from the selected basis. Notice that debits and credits from the basis will be reversed on the Incomes tab if the transaction type is Reversal. If the transaction type is Accrual, you can create a storno for the basis by using negative amounts.

...

Use the Transaction Remarks input box to provide any comments, description which will be used as transaction contents for generated GL journal entriesin the printed document.

The document totals and other information

...