Data Module wizard, step two
Save the data module or continue building it with the Data Module designer. Choosing either option ends the Data Module wizard process. You can always modify the data module with the Data Module designer or start over with the Data Module wizard.
Dialog box options
Save Data Module
Choose Save Data Module to open the Save dialog box and name the data module file. Unless you specify otherwise, the file is saved in the current directory and given a .DMD extension.
To modify the data moduleafter viewing it, click the Design button on the toolbar to open the Data Module designer..
Design Data Module
Choose Design Form, you don't have to name the data module file right away. You can continue working on it first.