Spreadsheet
When an application Spreadsheet is open, select Import | Spreadsheet (from the Import/Export menu on the application window title bar) to import an Excel spreadsheet as an application spreadsheet.
Text, CSV and a variety of Excel worksheet formats can be imported. Navigate to the location of the input file and click Open.
Caution: The Import will overwrite the contents of your current spreadsheet. You will be prompted to click OK or Cancel.
The imported spreadsheet (or text file) is opened in the application spreadsheet viewer.