The program is very simple to use. Clicking a swap button changes the bells and prints the conductor's call in the scroll box below. You may select various wording options for the calls. The order of bells above the swap buttons reflect the last change entered. In the example above, the first column shows the order of bells after the call is executed. The second column gives the calls according to the choice set by the user. In this case the first call is the down call. The next call is for the other moving bell, in this case moving up. The next is the call for the unaffected bell. Commonly known names are appended to the end. Pressing Undo will remove a bad change entered.