All* controls have to be connected to something, either main data source or a secondary one.
The thing is, when you create a form from data source, your main data source will be typically locked and you won't be able to modify it.
When you create a blank form the main data source is editable and you can add as many controls as you want.
* Controls such as buttons, hyperlinks and expression boxes do not need to be connected to a data source.
David Airapetyan / Software Services ArchitectQdabra® Software / Streamline data gathering to turn process into knowledge