Where is the Visio Diagram in My OneNote? I cannot find it.

​Question:
There is not the Diagram feature in "Insert" tab. I cannot find the Visio Diagram after Excel Spreadsheet feature.

Answer:
This is because you have not installed Visio application yet.

• If you have not installed Office Word, the Word features will do not appear in OneNote.
• If you have not installed Office Excel, the Excel features will do not appear in OneNote. 
• If you have not installed Office Outlook, the Outlook features will do not appear in OneNote.
• If you have not installed Office Visio, the Visio features will do not appear in OneNote.