Adding a visible or invisible signature to a PDF document
When signing a document, you can sign it invisibly so that no signature
form field appears in the PDF document, or you can sign it so that all your
signature information appears (as designated in the Configure Signature
Appearance dialog box), including any graphic that you’ve selected.
To sign a document, take these steps:
1. Open your Digital ID file by choosing Advanced➪Manage Digital
IDs➪My Digital ID Files➪Select My Digital ID File.
The Select My Digital ID File dialog box opens.
2. Select the filename of your user Digital ID in the Digital ID File drop-
down list, enter your password in User Password text box, and click
the OK button.
3. Choose Document➪Digital Signatures➪Sign this Document or, if the
Sign Task button is open on the Tasks toolbar, click it and choose Sign
This Document on the pop-up menu.
If the Alert - Document Is Not Certified dialog box appears, you are given
the opportunity to add a Certifying Signature to the document, which will
be invalidated if unauthorized changes are made. To specify this added
security feature, click the Certify Document button and follow the
prompts; otherwise, click the Continue Signing button to open the
Sign Document dialog box.
4. Select the Create a New Invisible Signature radio button, and then
click Next to open the Apply Signature to Document dialog box.
Alternatively, if you wish to sign the PDF document with a visible signa-
ture, select the Create a New Signature Field to Sign radio button, click
Next, and then draw a signature field in the PDF document by dragging
the mouse in the area you want to sign.
5. If you want to add the reason for signing the document, your location,
or contact information to the signature information (that can be viewed
in the Signatures palette), click the Show Options button to expand
the Apply Signature to Document dialog box, so that it includes the
fields shown in Figure 11-6.
6. To include the reason for signing the document as part of the signa-
ture information, select the reason from the Reason for Signing
Document drop-down list (such as I Am Approving This Document or
I Am the Author of This Document).
Note that you can edit the reason you select by clicking the insertion
point in the text and then inserting or deleting text as needed.
Chapter 11: Securing PDF Files