Hello, the handwritten signature of filling in the form supports modification. If you haven't submitted the form, you can follow the following steps: 1. Mobile phone: when the signature is not completed, you can click the eraser icon in the lower right corner of the signature to clean up all the filled contents at one time; If you have finished signing, you can click ×, or click the button next to the pen to re-sign, as shown below: 2. On the computer side, you can click the eraser icon in the lower right corner of the signature to clean up all the contents at once, and then re-sign.