1. First, type a bracket 1 at the end of the quoted sentence. After it is selected, click Right Click-Font to see the superscript in the effect box. After checking, click "OK" to finish the corner marking of the paper. In addition, formula numbers are often used in this paper. Let's see how it works.

2. First, we open word on the computer, and then input SO2 in it. Then we choose the number 2. Then we click the superscript in the toolbar. The result is as shown in the figure, so that we can mark the corner.

3. Select "superscript" in the pop-up dialog box, and then click OK to finish. For corner marks with other serial numbers, just copy and paste the upper corner mark of the mark, and then change the number. Isn't it simple?

4. Step 1: Place the mouse pointer on the text to which the footnote needs to be added, and then click the reference function in the toolbar above to insert the footnote. Step 2: After insertion, the last article will display a superscript small number, and then it can be annotated or expanded at the end of the article.