Resize Track
You can resize a track so that you can better edit the sounds on the track or so that you can see more tracks on the screen at once.

Resize a track by moving the mouse to the bottom of a track and drag up or down.  Alternatively, you can click on the Track menu, followed by Track Height, followed by a size of Small, Normal or Large.  You can also right click on a track and select Track Height followed by Small, Normal, or Large.  Another way to resize the track is to click on the Track Details Tab  followed by selecting a track size.

Resizing All Tracks
You can resize all tracks at once by clicking on the View menu, followed by All Tracks Height followed by Small, Medium or Large.