You can import any file saved in TEXT format into a data window.
Step 1
Choose Open (Cmd-O) from the File menu.
Step 2
Locate and double-click a TEXT file in the dialog that appears, or select the file and click the Open button.
The data appears in a new data window and is formatted according to the options you set in the TEXT File I/O Preferences dialog. Text is imported starting with the Home cell.