1. Open the graduation thesis in Word, and find the paragraphs whose endnotes need to be converted.

2. Select the paragraph and move the cursor to the reference number of the endnote.

3. Click the right mouse button and select "Convert to Footnote" in the pop-up menu.

4. In the pop-up dialog box, select a footnote and set the numbering format, position and font of the footnote.

5. Click OK to complete the operation of converting endnotes into footnotes.

Keeping references and footnotes in the paper at the same time can follow the following steps:

1. Open a reference management tool in Word, such as EndNote or Zotero.

2. Add the documents to be cited in the reference management tool, and set the citation format and style.

3. Insert footnotes where references need to be inserted in the Word document, and insert corresponding references in the footnotes.

4. Generate a reference list in the reference management tool and insert it at the end of the document.

5. Finally, the styles and typesetting of references and footnotes can be adjusted as needed.

In a word, it is convenient for readers to read and understand by converting endnotes into footnotes, and keeping references and footnotes in the paper can improve the academic value and readability of the paper.