Microsoft's Official Template Gallery offers "Educational" layouts for Word and PowerPoint that serve as excellent starting points for a DIY textbook. Key Content to Include in Your Piece
Explain how to choose between a vertical (portrait) or horizontal (landscape) layout based on the subject matter.
Discuss the importance of adding sections for "Notes," "Glossary," and "Self-Check Questions" to make the blank useful for students.
For high-quality visual mockups, search Freepik using terms like "blank book mockup" or "open textbook template."