Click Zoom In
to zoom in and view smaller parts of the script in
more detail. This is useful if you want to use a wide range of facial
expressions for different words of the script.
Click Zoom Out
to zoom out and view a larger portion of the script.
Click Zoom Out
Full 
to zoom out and view the complete script
in the sequence window.
Click Zoom to Selection 
to zoom out fully on the selected area of timeline.