Apple Soundtrack Pro 3 - Manual (Page 30)

Showing and Hiding the Panes
Tabs are grouped by function to optimize your workflow. For example, the media tabs
related to input and output functions (Meters, Recording, Search, Browser, and Favorites)
are located in the right pane by default. When you are finished with media input, you
can close the entire right pane by choosing Window > Toggle Right Pane, and thereby
allow more horizontal space for the project pane and the lower pane. If you hide a pane,
then later choose to show a tab that is in the hidden pane, the pane reappears and shows
all tabs in that pane.
30 Chapter 2 The Soundtrack Pro Interface