The zoom level is controlled by the vertical slider at the right edge of the display area. Buttons zoom to the entire audio sample or to the selected region. The left and center mouse buttons can be used to select an area of the waveform. Operating on the Selected Region Once a region of the waveform has been selected, it can be transformed. The Cut button removes a section of waveform to the buffer manager.
Copy leaves the waveform untouched and copies the selection to the buffer manager.
Kill replaces a segment with silence. Replace swaps the selected data with a waveform from the buffer manager. Insert Before and Insert After paste a buffer next to the selection. Reverse reverses the selected audio data.