The operation method of literature citation annotation [1] is as follows:

Tools/materials: Lenovo Xiao Xin Air 15, Windows 1 1, WPS Office 1 1.

1. First, on the document page, select the location where you want to insert the reference.

2. Then, under the Reference option, click Insert Endnote.

3. Then select the number of the endnote position.

4. Under Citation Options, click Footnotes and Endnotes.

5. Select a bracket style, and then click Apply.

6. At this time, you can see that the marking is finished.