You can print your form from FormFiller application, save it to work on the form later, or you may save the form image (both blank form and filled-in form). If you choose to save your form in a file of *.fff format - the format of FormFiller application - the resulting file will contain the scanned blank form image, the fields you've drawn on it together with their properties.
Note: You can save a copy of an already existing form, just select the Save Copy As item in the File menu.
To save the form as an image file: