Adobe 62000112DM User Guide - Page 289

ADOBE ACROBAT 3D VERSION 8 282 User Guide Note: If you enabled View Documents In Preview Document Mode When Signing in the Security Preferences, click Sign Document in the document message bar. 3 Click OK in the Save As Certified Document dialog box. 4 If you're adding a visible signature, draw the signature field on the page. Follow the on-screen instructions to select a digital ID, if prompted. Specify a default ID to avoid being prompted each time you sign a PDF. 5 In the Certify Document dialog box, specify the permitted changes, type your password, and then click Sign. 6 Save the PDF using a different filename than the original file, and then close the document without making additional changes. See also "Change the signing method" on page 256 "Specify the default digital ID" on page 256 "About digital IDs" on page 253 Clear or remove a digital signature ❖ Do one of the following: • To remove a signature, right-click/Control-click the signature field and choose Clear Signature Field. • To remove all signatures in a PDF, choose Clear All Signature Fields from the Options menu in the Signatures panel. If you want to delete the signature field, choose Tools > Advanced Editing > Select Object Tool, select the signature field, and press the Delete key. Validating signatures Checking the validity of a signature By default, signatures are validated when you open a PDF. An icon appears in the signature field on the document page to indicate the signature status. Further details about the status appear in the Signatures panel and in the Signature Properties dialog box. Third-party signature handlers may provide alternate methods of validating signatures. Check the documentation included with your third-party digital ID. Important: To ensure that signatures are validated when you open a PDF and that all verification details appear with the signature, set your verification preferences in advance (see "Set signature verification preferences" on page 284). • The digital signature icon of an unsigned signature field. along with the name of the field in the Signatures panel indicate the presence • The blue ribbon icon indicates that the PDF is certified-that is, it contains a valid certifying signature. (Certi­ fying signatures can be visible or invisible.) • The check mark icon indicates that the signature is valid.