To see a form and/or test the functionality and layout you can preview the form. This can be done from both the form overview and when you are creating the form itself.
Preview from form overview:
To preview the form from the Form overview, click on the preview icon under the Actions menu.
Preview when creating a form:
When you are creating a form you can preview it directly from the creating form view, by clicking on the "Preview Form" button next to "Save Form".
Once you are done with the preview, click "Edit Form" to be redirected back to the creating form overview.