How does Apple change the photo name?

How to change the name of the photo after it is stored in Apple's mobile phone is as follows.

Preparation tool: iPhone 1 1.

System version: iOS 14.5.

1. First open the photo of Apple's mobile phone, and click the Share button in the lower left corner of the photo page whose name you want to change.

2. Then click Save to File in the pop-up page.

3. Next, click the picture name at the top of the storage page.

4. Then the Rename Document page pops up.

5. Finally, after entering a new name, click Finish at the top right, and it is finished.