To see a print preview of the project, you can either:
Open the project up and then click on the print button at the top left.
Hover over the project in the projects list and then click on the printer icon to the left of the project name. This will take you straight into the report viewer instead of having to open the spreadsheet first.
The project will print to a quotation by default. To switch to another type of report, simply click on one of the buttons at the top of the page.