Depending on your settings, either a manager will open and close the register or each employee will have to open their own.

In order to be able to make any sales the register must first be opened.

Click the Options button in the Menu Bar. The options menu will appear.

Click the Register button.

At the Register menu click the Open button.

Enter the amount you are opening the register with.

Click Open Terminal.

The register is now open and sales can be completed.