1. Open the document or form to be signed, and click the "Electronic Signature" button in the toolbar.

2. In the pop-up electronic signature window, select "New Signature" or "Import Signature", and select the corresponding option as required.

3. If you choose "New Signature", you need to enter the name and password of the signature and complete the creation of the signature according to the prompts.

4. After creating or importing the signature, select the location to be signed, and enter the signature password in the pop-up window to complete the signature.

5. After signing, you can choose "Save" or "Save As" to save.