Apple Final Cut Pro 6 - Manual (Page 396)

Chapter 4 Using Markers 63
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To move the playhead to a clip or sequence marker in the Timeline, do one of
the following:
m Drag the playhead to a sequence marker in the ruler.
If snapping is turned on, the playhead snaps to the position of a nearby marker.
m Control-click the Timeline ruler, then choose a marker from the list of sequence and clip
markers in the shortcut menu.
To move to the next marker (to the right), do one of the following:
m Choose Mark > Next > Marker.
m Press Shift-M.
m Press Shift–Down Arrow.
To move to the previous marker (to the left), do one of the following:
m Choose Mark > Previous > Marker.
m Press Option-M.
m Press Shift–Up Arrow.
Choose a marker.