Can copies of patents and ID cards be watermarked?

Hello, you can add watermark. The method is as follows: 1. Open the bag scanner with your mobile phone and the camera interface will open. Click the ID photo option. 2. At this point, a rectangular box will appear on the camera interface. Putting your ID card in a rectangular box will automatically identify the area and take photos. 3. After taking photos on both sides of the ID card, you can see that both sides are on the same piece of paper. Click the watermark icon below. 4. Enter the watermark text content in the pop-up "Please Enter Watermark Label" dialog box. 5. Click Save/Share in the upper right corner.