1. Open the Excel file.
2. Click 'Developer Tools' on the command ribbon.
3. Click the down arrow on the 'Insert' button in the 'Controls' group. A list of controls appears.
4. Click the 'Check Box' button. This button displays a check mark inside of a square. The pointer changes to a ' ' symbol.
5. Click on the cell to place the check box. A square and the text 'Check Box 1' display on the worksheet.
6. Edit the text if desired. For example, delete 'Check Box 1' and type an item or a step to compile a list.
7. Click the text to insert a check or tick in the check box. To remove the check, click again on the text.
8. Press 'Ctrl' and 'S' simultaneously to save the file.