Troubleshoot Lagging Issue in Word Document

My 13-page Word document is lagging when I use it. It contains text with images. I need someone to troubleshoot and fix the lagging issue without altering the document's wording, design, page count, font, or anything else.

Ideal skills for this job:
- Proficiency in Microsoft Word, specifically the latest version
- Experience with troubleshooting Word documents
- Attention to detail to ensure the document's integrity remains intact

Please note, I have not tried any troubleshooting steps and have not altered the document in any way.