A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Use "Save As" to save the Excel file as a normal Excel file and tick the "Save Thumbnail option".
If option not available see File - Properties - Advanced Options - Summary - "Save Thumbnail for All Excel Documents".
Then save your file as a template.
I am hoping to discover how the Thumbnail would show a page, currently shows the top 7 rows.