The fields you inserted have no data source assigned yet, so these are not able to display information from the database. To assign data source, use the (Data Source) tab of the Property Editor pane.
The very first step is to specify the form's data source, i.e. a place the displayed data will be fetched from. As mentioned above, you will use table Persons as a data source for your new form.
You have assigned form's data source. Now you need to do specify widget's data source.
You can now save the form's design (this is not mandatory to test the form in action). To save, click thetoolbar button. Upon saving you will be asked for entering the form's name. Enter Persons as caption and click the button. The form's name will be filled automatically.
This is the right moment for testing your form. Click thetoolbar button. Unless you made a mistake while entering data sources, you should see the form's fields filled with data from the Persons table.
|* If you want to remove widget's data source assignment for a form widget, you can use the button in the box.