When you start recording, Wait for Note causes FreeStyle to repeat measure zero indefinitely until you play the first note. After the first note is received, FreeStyle continues on into measure 1 the next time it reaches the end of measure 0. You can play notes anywhere in measure 0 as pickup notes to the section. FreeStyle is also intelligent about notes played a little past the downbeat of measure 1 and will adjust these notes to their correct position instead of putting them at the very beginning of the pickup measure. Wait for Note is a checkable menu item. Check it to turn it on; uncheck it to turn it off.