1. Unlock the iPhone 7 and go to the home screen, find and open Notes.

2. Click on the lower right corner of the application memo to create a new blank memo.

3. Enter the blank memo and click the Add button above the input method.

4. In the pop-up list that pops up from the system, select the photo gallery.

5. The page jumps to the system album, select the background photo you want to set and click Finish.

6. After clicking Finish, the selected photo can be successfully set as the memo background.