Tracks in the Arrange area can be zoomed individually in conjunction with, or independent of, the global zoom controls (and Waveform Zoom slider) for the window. There is a default zoom setting for tracks, which is automatically chosen when a window is first opened. This setting is a good compromise between visibility of text and regions, and working space in the Arrange area.
Move the pointer to the bottom-left corner of a track.
The pointer changes to an index finger.
Click and drag to zoom in or out on the track.
The individual track zoom factor, compared to the overall window zoom level, is shown in the help tag while the mouse button is held down.
Tip: You can zoom all MIDI or audio tracks of your project at the same time by holding down the Command key while zooming. Pressing Shift while zooming a track resets all tracks to the default zoom setting.
You can use the View > Auto Track Zoom setting (or use the corresponding key command, default assignment: Control-Z) to automatically enlarge the currently selected track. Use the technique described above to set the desired zoom level on a track. Any subsequently selected track will automatically zoom to this level.
You can assign, and use, the following key commands to zoom tracks: