On the Payment Details tab, you can provide information about a document or multiple documents associated with the cash receipt and information on the exchange rates used for each document.
The "Cash Receipt (create)" form. The Payment Details tab
...
If the Project Costing functionality is enabled in the application on the Administration > Settings > General Settings form, you can link a cash receipt 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).
If the Enable Project Tasks option is selected on the Administration > Settings > Project Costing form, in the Project Task field (which becomes available) you can specify the particular task of the project to which this payment is related.
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 receipt amount to multiple planning documents and projects. You can add documents one by one to the list in the table by using the Add button on the table toolbar.
The "Cash Receipt (create)" form. The Payment Details tab in Table mode
...