› About PDF editing features › Secure PDF › Signatures overview › Set signature options

Set signature options

To set options for digital signatures, select Tungsten Power PDF for Mac > Options > Signatures.

In the Identities section, click More to manage your digital identities in the Digital ID List dialog box. Use the left panel to see all identities or only those from the macOS system.

In the Document TimeStamping section, click More and select Time Stamp Servers in the left panel to configure (add, remove, modify) settings for time stamp servers. Set a default server so that time stamps are added to all documents you sign.

Set Adobe Acrobat compatibility

  1. Select Power PDF > Options > Signatures.
  2. In the Creation & Appearance section, click More.
  3. Select Compatible with Adobe Acrobat.

    Adobe Acrobat will be able to verify digital signatures from your PDF documents. If you deselect it, only other copies of Power PDF can verify your signatures.

Set signing options, appearance, and defaults

  1. Select Power PDF > Options > Signatures.
  2. In the Creation & Appearance section, click More.
  3. Select the Default Signing Method and Default Signing Format in the concerning drop-down lists.
  4. In the When Signing section, select which items you want to be visible or required in your signatures. You can require a signing reason and/or time stamping information, include contact information and revocation status.
  5. In the Appearance section, create, duplicate, or delete signatures and edit their content. See Configure Signature Appearance for detailed steps.

Set verification options

  1. Select Power PDF > Options > Signatures.
  2. In the Verification section, click More.

    The Signature Verification dialog box appears, offers to select how to verify signatures in documents you receive.

  3. Select Verify signatures when the document is opened to have signatures verified as soon the document is opened (clear by default).
  4. Select When document has valid but not trusted signatures, prompt to review and trust signers to flag untrusted signatures (clear by default).
  5. In the Verification Behavior section, under When Verifying, specify a default verification method and select which method should be used to verify signatures; this default method or the method specified in the document. In the latter case select how to proceed if no method is specified – be prompted or use the default.
  6. In the Verification Time section, under Verify Signatures Using, select which time to use for verification: current time, signature creation time, or a time embedded in the signature (for example a time stamp).
  7. In the Verification Information section, specify what to do with the verification information when saving a signed PDF. Select one of the following options:
    • Ask When Adding – When such information is added to a document, Power PDF starts a dialog box to ask.
    • Always – Verification information is saved with the signed PDF document automatically.
    • Never – Verification information will not be saved.
  8. In the MacOS Integration section, specify whether you want to trust all root certificates stored in Keychain for validating signatures and certified documents. If you want to decide on a case-by-case basis, you should not enable these options.