How to mark a box in a word document?

1. First, insert the image to be marked into the word document, as shown.

2. After inserting, click "Insert" at the top left of the page, and then select the arrow shape under "Shape", as shown in the figure.

3. Then drag the arrow with the mouse to adjust the position and length.

4. Then click "Text Box" at the top right of the page and insert a text box at the end of the arrow.

5. Then, enter the corresponding text in the text box, and the picture annotation is completed.