Here are some quick keys that we recommend to help you improve your work flow with Soundtrack Pro.

General shortcut keys to use in Soundtrack Pro 

Space Bar = makes playhead play
Return = brings playhead to beginning of file/project
Shift+Return = brings playhead to beginning and starts playing
Option-Right/Left Arrow = Moves the playhead forward or backward by one frame

L = To begin forward playback at normal (1x) speed
J = To begin reverse playback at normal (1x) speed
K = To pause playback
JJ or LL = To double the current playback speed, forward or reverse
To move the playhead at below 1/2x speed hold down the K key, then press and hold down J or L

Layouts:

Control A = Show/Hide Left Pane
Control S = Show/Hide Lower Pane
Control D = Show/Hide Right Pane

Navigation:

Apple + = Zoom In horizontally
Apple - = Zoom Out horizontally
Apple Shift + = Zoom In vertically
Apple Shift - = Zoom In vertically
Shift Z = view the entrie file or project in the editing window
N = Snaping off and on
M = Make a marker
Shift M = moves playhead to next marker
Option M = moves playhead to previous marker

Quick Keys for Multitrack Projects ONLY:

B = Razor Blade Tool
A = Arrow or Selector Tool
S = Split a track in two
Option S = Join two split track back together
E = To show/hide envelopes for specific tracks
Up Arrow = takes playhead to start of next clip in timeline
Down Arrow = takes playhead to end of previous clip in timeline

If your project looks like the following:

it's because your vertical adjustment is off.

Use the Apple (Ctrl on a PC) Shift and + or - keys to adjust the vertical height of your waveform.

These views can be also found under the VIEW menu at the top of the screen.