1. Open the PDF file to which you want to add a personalized signature

2. Click the Signature button in the "View" drop-down menu in the toolbar.

3. Click the Place Signature option in the signature bar on the right, and the Place Signature dialog box will pop up.

4. Select "Draw my signature". You can use the mouse to draw your own signature in the signature drawing area. After the drawing is completed, click "Accept".

5. Find the part where you want to place the signature in the document, click Place Signature on the right, move the mouse to the part of the signature and click.

6. When you do not want to use text as your signature, but want to use a picture, select "Use Image" in step 4 to load the image you want to use, and click "Accept" "This is how your signature turns into a cute image. If you want to use a certificate, you can also select the "Use Certificate" option in step four.

7. When you are tired of using your signature and want to change it, you can click the small triangle to the right of "Place Signature" under the signature column on the right and select Change Saved in the drop-down menu. Just sign.