The Clear command removes the current sound data from the display canvas. Click SELECT on Clear when you want to delete all the data in the canvas.
The clear operation does not change the name of the file that's being edited. Take care not to accidentally save an empty canvas to an audio file.
The clear operation can be undone, and the audio data is retained so that it can be used by a Redo operation. However, since newly recorded data consumes space in the temp file directory, you might consider using the File New operation. This operation, which cannot be undone, recovers the unused space in the filesystem.