On the Payment Details tab, you can provide information about documents related to this bank payment. 
The "Bank Payment (create)" form. The Payment Details tab
In the Correspondence GL Account field, select a GL account to be used in GL journal transactions generated for the document.
In the Department field, you can select the department associated with the document.
In the Business Activity field, you can select a business activity to which the document is related.
The Planning Document field is available if the Use a payment calendar option is selected on the Administration > Settings > Cash Management form. The field is auto- populated in case when the payment is based on a Money Transfer (Plan) or Money Payment (Plan) document.
If the Project Costing functionality is enabled in the application on the Administration > Settings > General Settings form, you can link a bank payment with a related project which you can select in the Project field (to find a project, start typing its name or code in the field).
Table mode
There is a switch for changing the display mode which is located to the right on the tab, Table Mode. Use Table mode to apply the payment amount to multiple planning documents and projects. You can add documents one by one to the list in the table.
Use the Add button to add documents to the list. 
The "Cash Payment (create)" form. The Payment Details tab in table mode
In the Payment Amount column, specify the partial amount which will be applied to a particular planning document or project. If the received amount is applied to multiple projects and planning documents, the total amount (which is displayed in the Total Amount field under the table) must be equal to the sum in the Payment Amount column.