The first step is to create a form. Select New → Seam Form:

Now, enter the name of the Seam component. JBoss Developer Studio selects sensible defaults for other fields:

Go to http://localhost:8080/helloworld/hello.seam. Look at the generated code. Run the test. Experiment with adding new fields to the form and Seam component. There is no need to restart the application server each time you change the src/action code, as Seam hot-reloads the component for you.