| Package | Description | 
|---|---|
| com.itextpdf.forms | |
| com.itextpdf.forms.fields | |
| com.itextpdf.forms.xfa | |
| com.itextpdf.signatures | 
| Class and Description | 
|---|
| PdfAcroForm 
           This class represents the static form technology AcroForm on a PDF file. 
          | 
| PdfSigFieldLock 
           A signature field lock dictionary. 
          | 
| PdfSigFieldLock.LockAction 
           Enumerates the different actions of a signature field lock. 
          | 
| PdfSigFieldLock.LockPermissions 
           Enumerates the different levels of access permissions granted for the document when the corresponding signature field is signed:  PdfSigFieldLock.LockPermissions.NO_CHANGES_ALLOWED- no changes to the document are permitted; any change to the document invalidates the signature,PdfSigFieldLock.LockPermissions.FORM_FILLING- permitted changes are filling in forms, instantiating page templates, and signing; other changes invalidate the signature,PdfSigFieldLock.LockPermissions.FORM_FILLING_AND_ANNOTATION- permitted changes are the same as for the previous, as well as annotation creation, deletion, and modification; other changes invalidate the signature. | 
| Class and Description | 
|---|
| PdfSigFieldLock 
           A signature field lock dictionary. 
          | 
| Class and Description | 
|---|
| PdfAcroForm 
           This class represents the static form technology AcroForm on a PDF file. 
          | 
| Class and Description | 
|---|
| PdfAcroForm 
           This class represents the static form technology AcroForm on a PDF file. 
          | 
| PdfSigFieldLock 
           A signature field lock dictionary. 
          | 
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