Digital signature lets you add an empty digital signature field to a PDF document. Recipients of the form will be prompted to digitally sign the file with their digital IDs after clicking on this field. However, in order to sign a digital signature field, the digital ID must contain your unique signature and other information to identify yourself. See Manage digital IDs for details. To create a new digital signature form field:

  1. Open a PDF file and choose Form > Digital Signature.

  2. On the page, drag a rectangle where you want the digital signature field to appear. To call out the Digital Signature Properties dialog box, do either of the following:

    • The dialog box appears automatically right after the field is created.

    • Or on the Sidebar Navigation pane or under the Basic tab, click Select and use it to double-click the field

  3. In General, name the field and set its field attributes. To make it a required item, check Required at the bottom. You can then use Highlight Fields to outline the required item to draw more attention to it. See Form preferences.

  4. In Sign, click the drop-down menu and define how the other fields react when the digital signature field is signed:

    • Do nothing when signed. Nothing happens after the field is signed. All fields are still available.

    • Marked "All fields" as read-only. All fields in the current PDF document become read-only (locked) after the digital signature field is signed.

    • Marked "All fields except followings" as read-only. Only the selected fields are available after the digital signature field is signed.

      1. Select Marked "All fields except following" as read-only from the drop-down menu.

      2. Click the Pick... button.

      3. In the Field Selection dialog box, select the fields that will remain available after the digital signature field is signed. Click OK.

    • Marked "Just these fields" as read-only. The selected fields will be locked. You cannot make any changes to the selected fields after the digital signature field is signed.

      1. Select Marked "Just these fields" as read-only.

      2. Click the Pick... button.

      3. In the Field Selection dialog box, select the fields that will be locked after the digital signature field is signed. Click OK.

    • Execute following script when signed. Activate a custom JavaScript when the form is digitally signed. Click Edit... to edit or create a new JavaScript action.

  5. Click Close.

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