In the Preferences dialog box, click the Display tab to adjust the Spectral and Waveform Display modes:

Windowing Function

Determines which method Adobe Audition uses to segment the spectral data before displaying it. The segments (windows) are listed in order from the narrowest frequency band/most noise to the widest frequency band/least noise. Blackmann or Blackmann‑Harris are usually good choices.

Resolution

Specifies the number of vertical bands used in drawing frequencies. The larger this number, the longer it takes for Adobe Audition to render the spectral display. Performance varies according to the speed of your computer.

Window Width

Specifies the window width (FFT frame size) used to plot spectral data, where 100% is a full frame. The default setting is 75%. If you want to increase time resolution and determine exactly where frequencies start, decrease the window width (50% to 75% works best). This makes the display more accurate along the timeline (left and right), but less accurate along the frequency scale (up and down).

Decibel Range

Adjusts the visible amplitude range for Spectral Frequency Display.

Initial Viewing Range

Determines the default length of audio that the Top/Tail Views option displays.

Link Top/Tail Zoom Levels

Automatically matches zoom levels in each view.

Show Marker And Range Lines

Displays marker and range lines in the waveform display. Marker and range entries listed in the Marker List appear in the waveform as vertical dotted lines overlaying the audio, connecting the arrows from the top to the bottom of the display.

Show Grid Lines

Displays grid lines in the waveform display. The grid lines mark off time on the horizontal x‑axis and amplitude on the vertical y‑axis.

Show Center Lines

Displays center lines in the waveform display. The center lines represent zero amplitude of the waveform’s right and left channels.

Show Boundary Lines

Displays boundary lines in the waveform display. Boundary lines are the horizontal lines that visually indicate where the waveform’s amplitude approaches or exceeds the clipping level. The value in the Display Lines At option specifies the amplitude at which the boundary lines appear.

Peak Files

Specifies options for peak (.pk) files, in which Adobe Audition stores information about how to display WAV files. Peak files make file opening almost instantaneous by greatly reducing the time it takes to draw the waveform (especially with larger files).

Peaks Cache

Determines the number of samples per block to use when storing peak files. Larger values reduce the RAM requirement for large files at the expense of slightly slower drawing at some zoom levels. If RAM is an issue on your system, and you’re working with very large files (several hundred megabytes or more in size), consider increasing the Peaks Cache to 1024 or even 1536 or 2048.

Save Peak Cache Files

Saves peak (.pk) files in the same folder as all WAV files. You can safely delete peak files or deselect this option; however, without peak cache files, larger audio files reopen more slowly.

Rebuild Wave Display Now

Rescans the current file for sample amplitudes and redraws the waveform.

Show On-Clip Gain Control When There Is No Selection Range

Always shows the on-clip control, so you can adjust the amplitude of an entire file without first making a selection.