It is possible to set one or more tables from which to retrieve the values to be inserted in the additional table of the document, without having to create a field of type Subtable.
This allows you to select values from a table and write them in the main grid of the document. Click on Set to display the management window.
A description is entered in the first column identifying which table the data will be read from and the actual name of the table. The links will then be established to create the relationship between the two tables