1. Open the camera application of Huawei mobile phone.

2. In the camera interface, slide the toolbar below to find and click the "More" option.

3. in the "more" function, select and open the "watermark" setting.

4. On the watermark setting page, you can see that there are many types of watermarks, such as color, shape, location, food, mood and time.

5. Select your favorite watermark type and click to enter editing mode.

6. In edit mode, you can click the watermark icon to add or change the watermark.

7. If necessary, you can customize the text content in the watermark.

8. after adding or changing, click the check button in the lower right corner to save the settings.