Open it with Foxit PhantomPDF and choose Form Form Recognition Run Form Field Recognition . All fillable fields in the document will be recognized and highlighted.2. Add form fields from Form Form Fields click a type of form field button and the cursor changes to crosshair . And the Designer Assistant is selected automatically.3. All the corresponding type of form fields will be automatically named with the text near the form fields (Take the text fields for an example as below).4. Click the place you want to add the form field. To edit the form field further, please refer to the properties of different buttons from u201cButtonsu201d.