CueLevel 1.3.0

Fader for the selected section with a live dB readout, plus dB values on every section and a dB scale.
Zoom: Option-scroll, pinch, T/R or the magnifier buttons; scroll or use the overview strip to move; time ruler.
Hear edits as you make them: playback in the editor includes your clip gain in real time.
Undo and redo (⌘Z / ⇧⌘Z), ↑/↓ to nudge 0.5 dB (Shift for 3 dB), fades typed in milliseconds.
Play section and Measure section loudness buttons.