Adding text to photos can be edited directly in the mobile phone album. Take OPPO R 15 mobile phone as an example, and the specific operation steps are as follows:

1. First, open the phone photo album, select the photo to add text, and click Enter.

2. After entering, click the edit button at the bottom of the screen.

3. Click Edit to enter the interface shown below, and then click Text.

4. After clicking the text, you can select the text color and font thickness below.

5. After choosing the color and text thickness, you want to add the text in the picture, and then click that position to add it.

6. After adding the text, click the button marked in the red box in the lower right corner.

7. Then click Finish in the lower right corner to save the edited picture.

8. After saving, you can see the photo with the text just added.