How to write block letters when taking pictures with Apple mobile phone?

Edit the picture and add block letters.

1. First open "Camera Roll", click the photo you want to edit, and click "Edit" in the upper right corner. 2. Then click the "three points" icon below, select "Mark", click the "plus key" in the lower right corner, and select "Text". 3. Enter the text in the text box again, and you can also change the font color and size. Click "Finish" after editing.

There are many softwares that can edit pictures now, but it is very simple to add words to pictures, and general retouching software can do it.