Click on the Editor button on the toolbar. This will bring up a window that has rows and columns where you can enter your data. Each column represents a variable. You can enter both numeric or character data directly. You can also modify the data (e.g., correct typographical errors) using this window. To label variables after entering data, double-click on the box of the spreadsheet immediately above the column containing the data. When you are done, close the edit window (click on square in upper-left corner) and save changes when asked.