...
In the Entity field, select an entity of your company for which this document is being prepared. The Entity field is available if the Multi-Company Accounting option is selected on the following form: Administration > Settings> General Settings. You can select your personal default entity to appear in documents that you create; for this, refer to Personal Settings. If If you have not selected your default entity, the entity defined first will be used as the system default value.
...
In the Amount field enter the total amount to be paid by the entity. The default currency of the amount is the currency of
The Project column is available if the Project Costing functionality is enabled on the Administration > Settings > Project Costing form. Use the Project field to select the project associated with this document. If the payment is intended for multiple projects, the field can be used as a column on the Payment Details tab – for this, use the Settings button.
...
For descriptions of other buttons, see Document Toolbar.
Use the Settings button to invoke the Document Settings dialog box if you need to move the Project field from the document header (the Main tab) as a column to the table on the Payment Details tab or back.
...