Select the eighth beat label by clicking left or right, or using the
arrow keys, until the selection rectangle surrounds it.  Change the
`N' to an `A' by clicking the middle button or pressing
 .
(On some keyboards, if `Num Lock' is off, you can use the
.
(On some keyboards, if `Num Lock' is off, you can use the 
 key on
the numeric keypad instead of
 key on
the numeric keypad instead of 
 if you prefer.)  The `N' is
 if you prefer.)  The `N' is
