Zoom Normal — Zooms to the default view, which displays about one inch per second.
Zoom Out — Zooms out, displaying less detail about more time.
Fit in Window — Zooms out until the entire project just fits in the window.
Fit Vertically — Resizes all of the tracks vertically so they all fit inside of the window (if possible).
Zoom to Selection — Zooms in or out so that the selection fills the window.
Collapse All Tracks — Minimizes vertical size of all track to least possible value so that as many tracks as possible are visible on display without scrolling.
Expand All Tracks — Restores original height of tracks to the state they were in before been collapsed.
History... — Brings up the history window. It shows all the actions you have performed during the current session, including importing. The right-hand column shows the amount of hard disk space your operations used. You can jump back and forth between editing steps quite easily by simply clicking on the entries in the window, the same as selecting Undo or Redo many times in a row. You can also discard Undo history to save disk space. The history window can be kept open while you work.
Toolbars... — a submenu to enable or disable displaying various toolbars,namely: Control, Edit, Meter, Mixer and Transcription toolbars.