To resize the track header section of the Timeline window:

Position the pointer over the right edge of the track
header (where track names are listed) so that the resize tool
appears, and
then drag the right edge.
The icons at the top of the track header limit its
minimum width. The maximum width is about twice the minimum width.
To resize the height of a track:
- If necessary, expand the track by
clicking the triangle next to the track's name.
- In the track header area of the
Timeline window, position the pointer between two tracks so that the Height
Adjustment icon
appears; then drag up or down to resize the track below (for video) or the
track above (for audio).
Note: Collapsed tracks always appear
at the same height and cannot be resized.
To change the proportion of video and audio tracks visible
in the Timeline window:
- Either in the track header area on
the left or between the scroll bars on the right, position the pointer between
the Video 1 and Audio 1 tracks.
- When the split track tool appears
,
drag up or down.