1. Locate the PDF file to be signed and double-click it to open it.

2. Then File-Open-The location where the file is saved on the desktop. Locate the file and click Open. This method is a bit troublesome.

3. Then find the PDF signature on the opened page, and then select the Create Signature option;

4. You can choose to directly import a picture or draw a signature, choose the latter, then draw a custom signature that has been approved, then name it, and you can also add password protection.

5. Then double-click the application signature to get the following custom signature;

6. Note: This signature cannot be changed by others, because the password is set, so the signature can be protected.