In order to fit everything onto a single page within an excel spreadsheet, you first need to:
1. Select all the areas that you want to display in one page within the spreadsheet.
2. select the layout tab and click on 'set print area' from the print area icon.
3. click save
If you want to preview what the page would look like prior importing into Stellar, you can click on the file tab and then click print. It will give you a preview on what the page looks like.