Zoom In: Zooms in on the center of the visible waveform.

Zoom Out: Zooms out from the center of the visible waveform.

Zoom to Selection: If a selection has been made on the waveform, using this command will zoom into the selected region, which makes precise editing operations and adjustments to larger files more convenient.

Full Zoom: Expands the view to display the entire waveform or waveforms that are contained within a session.

Viewing Range: Defines the portion of a waveform that you want to appear in the window. This command lets you enter numerical values to serve as the visible boundaries for the x-axis (time) ruler in units of samples and milliseconds. The settings that you select appear in the waveform window when you click OK on the dialog box.