6.Double-click the Cut operation in the Undo pane. The Cut and Trim/Crop operations are both undone in the waveform and moved to the Redo pane.

Tip: To quickly undo and redo operations in the Undo/Redo History window, double-click the operation.

Clearing the Undo/Redo History for the current file

Clearing the current file’s Undo/Redo History frees up disk space by deleting the file’s temporary undo/redo files. However, deleting these temporary files prevents you from undoing changes made to the file since it was last saved (or beyond, if you have the Allow Undo past Save check box enabled on the General tab of the Preferences dialog). To clear the undo/redo history for the current file, go to the Edit menu and choose Clear Undo/Redo History.

Note: A file’s undo/redo history is also automatically cleared when you close the file or exit the software.

Selecting status formats

The status format determines how a file’s position and length information is displayed. The following table briefly describes supported status formats (hh=hours, mm=minutes, ss=seconds, and ff=frames). For more information, see SMPTE Timecode on page 339.

Format name

Description

Format

Samples

Number of samples

Numbered (starting with zero)

 

 

 

Time

Hours, minutes, seconds, and milliseconds

hh:mm:ss.sss

 

 

 

Seconds

Seconds and fractions of seconds

sssss.sss (to three decimal places)

 

 

 

Time & Frames

Hours, minutes, seconds, and frames.

hh:mm:ss.ff

 

 

 

Absolute Frames

Frames and fractions of frames

Numbered (starting with zero, to

 

 

three decimal places)

 

 

 

Measures & Beats

Measures, beats, and quarter beats

measures:beats.quarters

 

 

 

SMPTE Film Sync (24 fps)

SMPTE at 24 frames per second for

hh:mm:ss:ff

 

synchronizing with film

 

 

 

 

SMPTE EBU (25 fps, Video)

SMPTE at 25 frames per second for

hh:mm:ss:ff

 

European Broadcasting Union

 

 

 

 

SMPTE Non-Drop (29.97 fps, Video)

SMPTE at 29.97 frames per second

hh:mm:ss:ff

 

 

 

SMPTE Drop (29.97 fps, Video)

SMPTE at 29.97 frames per second using

hh:mm:ss:ff

 

dropped frame numbers

 

 

 

 

SMPTE 30 (30 fps, Audio)

SMPTE at 30 frames per second

hh:mm:ss:ff

 

 

 

Audio CD Time

Hours, minutes, seconds, and frames with a

hh:mm:ss:ff

 

frame rate of 75 frames per second for

 

 

creating disc-at-once CDs.

 

 

 

 

80 CHAPTER 3