1. Place the mouse cursor at the position where you need to insert the reference, click the Insert menu, select the reference, and then select the footnote and endnote to open the footnote and endnote window.

2. Click the endnote, select the end of the document, select 1, 2,3 as the numbering format, and then edit the endnote where the end of the document appears.

3. Cross-reference: insertion, reference and cross-reference. The reference type is endnote, and the reference content is endnote number. Select the required literature.