Apple Final Cut Pro 7 - Manual (Page 23)

Chapter 1 A First Look at Final Cut Pro 23
Reposition the playhead in the Canvas (if your mouse has a trackball):
Position the pointer over the Canvas and roll the trackball left or right to reposition the
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playhead in the Canvas and Timeline.
Change the display of the Canvas:
Choose Show Overlays from the View pop-up menu. Choose Show Title Safe from
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the View pop-up menu to have Final Cut Pro display borders showing the part of the
image that will appear on a standard video screen. Choose Show Overlays from the
View pop-up menu again to turn off the display of overlays.
View pop-up menu