LibreOffice 7.5 Help
Opens a window where you can select a database field to add to the form.
The field selection window lists all database fields of the table or query that was specified as the data source in the Form Properties.
You can insert a field into the current document by dragging and dropping. A field is then inserted which contains a link to the database.
If you add fields to a form and you switch off the Design Mode, you can see that LibreOffice adds a labeled input field for every inserted database field.