Apple Final Cut Pro 7 - Manual (Page 1990)

zoom level The level at which the Viewer, Canvas, or Timeline is magnified. You can
adjust the level of precision of your editing by setting the zoom level. For example, by
zooming in on the Timeline, you can make changes to a clip’s individual frames. Conversely,
you can zoom all the way out to see the entire project and work on very large sections
at once.
Zoom slider The slider control that appears at the bottom of the Timeline. The Zoom
slider allows you to navigate throughout the total duration of the currently displayed
sequence; you can use the thumb tabs on the left and right of the slider to zoom in to
and out of a sequence for a more detailed view.
1990 Glossary