On the far left of the switch block is a small
    arrow indicating the ON position.

    So, in this example,
    switches 1 through 5 are ON.

    On the far left of the switch block is a small
    arrow indicating the ON position.

    So, in this example,
    switches 2, 5, 7 and 8 are ON.

    Note the "OPEN" on the switch block.
    
      Open = Off
    Closed = On

    So, in this example,
    switches 2, 5, 7 and 8 are ON.