Details are as follows: 1. Find the "Settings" box on the phone home page and click Open. 2. Then find "My Device" and click Open to see if the mobile phone system is the latest version. 3.3, ensure that the mobile phone system is the latest version, which can prevent some old systems from not having this function. 4.4. At this time, go back to the home page, find the "camera" icon on the home page of the mobile phone, and click. 5.5. After entering the shooting interface, click the "More" setting key indicated by the arrow in the upper right corner. 6.6. A menu will pop up at this time. Locate Settings and click Open. 7.7. Find the "Time Watermark" function, and slide the switch at the back to turn it on. 8. If you take a photo at this time, there will be a time and date in the lower right corner of the photo.